Antibiotic-resistant Staphylococcus aureus: Investigation of a poultry reservoiralmaples
This document is a dissertation proposal investigating antibiotic-resistant Staphylococcus aureus in poultry. The study aims to characterize the ecology and epidemiology of antibiotic-resistant S. aureus in poultry farms and processing facilities. The proposal outlines collecting samples from poultry, workers, and environments to establish prevalence and risk factors. Molecular typing and antibiotic resistance testing will characterize strains. The results could provide recommendations to prevent the spread of S. aureus in poultry production.
A PROPOSAL ON BIOFILM FORMATION AND ANTIBIOTIC SUSCEPTIBILITY PATTERN OF Stap...Shrezjana Mainali
This document presents a proposal to study biofilm formation and antibiotic susceptibility patterns of Staphylococcus aureus in clinical samples. It provides background on S. aureus as a common pathogen and discusses the emergence of antibiotic-resistant strains like MRSA. The proposal aims to determine the prevalence of biofilm formation among S. aureus isolates from clinical samples and identify associations between biofilm production and antibiotic resistance profiles. It justifies the study by noting the lack of research on biofilm-producing MRSA in Nepal and the potential for findings to improve treatment. The proposal acknowledges limitations from the short study period and lack of extensive prior research and optimal laboratory facilities in Nepal.
This study evaluated the antibacterial effects of copper on microorganisms isolated from bovine mastitis. Milk samples were collected from dairy farms in central and southern Chile between March and September 2013. A total of 327 microorganisms were isolated and identified, with the most common being Escherichia coli, Staphylococcus aureus, Staphylococcus uberis, and coagulase-negative Staphylococci. Antibiotic susceptibility testing found 34% of isolates were resistant to at least one antibiotic. Minimum inhibitory concentration (MIC) assays found that 250 ppm copper inhibited the growth of 65% of isolates. The remaining isolates were inhibited by concentrations between 375-1000 ppm copper. Copper
Cameron Cardenas has a Master's degree in Agriculture with a focus on poultry science and nutrition from Mississippi State University. He has conducted research projects on antibiotics, antibiotic alternatives, and their effects on broiler performance. He has authored or co-authored several publications and presentations on topics related to broiler nutrition, antibiotics, and amino acid digestibility. Cardenas is currently working as an apprentice in construction while gaining research experience in poultry science.
EWMA 2013 - Ep451 An in vitro and clinical assessment of a nonadherent, antim...EWMAConference
Sharon Lindsay, Alexander Waite, Rachael McInnes, Breda Cullen, Systagenix, Gargrave, UK
Robert J. Snyder, DPM, MSc, CWS, Professor, Barry University SPM, Miami Shores, Florida, USA
This study analyzed 280 samples collected from the hands and mobile phones of 140 healthcare workers at a tertiary hospital to assess the role of poor hand hygiene and mobile phone use in transmitting hospital-acquired infections. Bacterial growth was detected in 220 samples, with pathogenic organisms found in 75 samples. Escherichia coli was the most common isolate, followed by Klebsiella species. Several isolates were found to be methicillin-resistant Staphylococcus aureus and extended-spectrum beta-lactamase producers. The results suggest that healthcare workers' hands and mobile phones can transmit pathogenic bacteria in hospitals and may contribute to the spread of antimicrobial resistance.
This document provides the curriculum vitae of Khaled Mahmood Al-Qaoud, including his education, professional experience, patents, and publications. It lists that he received a PhD in Immunology from Hamburg University in Germany, worked as a professor of Immunology at Yarmouk University in Jordan, and has authored over 30 scientific publications in peer-reviewed journals. It also outlines his roles managing research and production for a monoclonal antibody company from 2010-2015 and serving as chairman of the Department of Biological Sciences at Yarmouk University.
BIOMED Engineering Experimental proposal for Growth E.ColiMinh Anh Nguyen
The document describes an experiment to create and validate a mathematical model of the growth curve of E. coli bacteria after exposure to thermal shock at different temperatures. It discusses how temperature, initial bacterial concentration, and other factors affect the growth and decay rate of E. coli. The experiment subjects E. coli to thermal shock at temperatures from 45-70°C and measures its growth curve at 37°C compared to a control group grown at 37°C. The data will be used to create a growth curve model and compare the experimental and modeled curves.
Antibiotic-resistant Staphylococcus aureus: Investigation of a poultry reservoiralmaples
This document is a dissertation proposal investigating antibiotic-resistant Staphylococcus aureus in poultry. The study aims to characterize the ecology and epidemiology of antibiotic-resistant S. aureus in poultry farms and processing facilities. The proposal outlines collecting samples from poultry, workers, and environments to establish prevalence and risk factors. Molecular typing and antibiotic resistance testing will characterize strains. The results could provide recommendations to prevent the spread of S. aureus in poultry production.
A PROPOSAL ON BIOFILM FORMATION AND ANTIBIOTIC SUSCEPTIBILITY PATTERN OF Stap...Shrezjana Mainali
This document presents a proposal to study biofilm formation and antibiotic susceptibility patterns of Staphylococcus aureus in clinical samples. It provides background on S. aureus as a common pathogen and discusses the emergence of antibiotic-resistant strains like MRSA. The proposal aims to determine the prevalence of biofilm formation among S. aureus isolates from clinical samples and identify associations between biofilm production and antibiotic resistance profiles. It justifies the study by noting the lack of research on biofilm-producing MRSA in Nepal and the potential for findings to improve treatment. The proposal acknowledges limitations from the short study period and lack of extensive prior research and optimal laboratory facilities in Nepal.
This study evaluated the antibacterial effects of copper on microorganisms isolated from bovine mastitis. Milk samples were collected from dairy farms in central and southern Chile between March and September 2013. A total of 327 microorganisms were isolated and identified, with the most common being Escherichia coli, Staphylococcus aureus, Staphylococcus uberis, and coagulase-negative Staphylococci. Antibiotic susceptibility testing found 34% of isolates were resistant to at least one antibiotic. Minimum inhibitory concentration (MIC) assays found that 250 ppm copper inhibited the growth of 65% of isolates. The remaining isolates were inhibited by concentrations between 375-1000 ppm copper. Copper
Cameron Cardenas has a Master's degree in Agriculture with a focus on poultry science and nutrition from Mississippi State University. He has conducted research projects on antibiotics, antibiotic alternatives, and their effects on broiler performance. He has authored or co-authored several publications and presentations on topics related to broiler nutrition, antibiotics, and amino acid digestibility. Cardenas is currently working as an apprentice in construction while gaining research experience in poultry science.
EWMA 2013 - Ep451 An in vitro and clinical assessment of a nonadherent, antim...EWMAConference
Sharon Lindsay, Alexander Waite, Rachael McInnes, Breda Cullen, Systagenix, Gargrave, UK
Robert J. Snyder, DPM, MSc, CWS, Professor, Barry University SPM, Miami Shores, Florida, USA
This study analyzed 280 samples collected from the hands and mobile phones of 140 healthcare workers at a tertiary hospital to assess the role of poor hand hygiene and mobile phone use in transmitting hospital-acquired infections. Bacterial growth was detected in 220 samples, with pathogenic organisms found in 75 samples. Escherichia coli was the most common isolate, followed by Klebsiella species. Several isolates were found to be methicillin-resistant Staphylococcus aureus and extended-spectrum beta-lactamase producers. The results suggest that healthcare workers' hands and mobile phones can transmit pathogenic bacteria in hospitals and may contribute to the spread of antimicrobial resistance.
This document provides the curriculum vitae of Khaled Mahmood Al-Qaoud, including his education, professional experience, patents, and publications. It lists that he received a PhD in Immunology from Hamburg University in Germany, worked as a professor of Immunology at Yarmouk University in Jordan, and has authored over 30 scientific publications in peer-reviewed journals. It also outlines his roles managing research and production for a monoclonal antibody company from 2010-2015 and serving as chairman of the Department of Biological Sciences at Yarmouk University.
BIOMED Engineering Experimental proposal for Growth E.ColiMinh Anh Nguyen
The document describes an experiment to create and validate a mathematical model of the growth curve of E. coli bacteria after exposure to thermal shock at different temperatures. It discusses how temperature, initial bacterial concentration, and other factors affect the growth and decay rate of E. coli. The experiment subjects E. coli to thermal shock at temperatures from 45-70°C and measures its growth curve at 37°C compared to a control group grown at 37°C. The data will be used to create a growth curve model and compare the experimental and modeled curves.
This document summarizes a study on multidrug resistant organisms and their antibiotic resistance patterns among intensive care unit patients in Surat City, India. The study found that Pseudomonas aeruginosa and Klebsiella species were the most common causes of healthcare-associated infections. It also found high resistance of these organisms to cephalosporins but that amikacin and imipenem were the most effective antibiotics. Regular monitoring of resistance patterns was deemed important for guiding empirical treatment of infections in ICU patients.
Antibiotic Susceptibility Pattern of Pyogenic Bacterial Isolates in Sputum.IOSR Journals
Drugs Have Been Used For The Treatment Of Infectious Diseases Since 17th Century , However
Chemotherapy As A Science Has Began With Paul Ehrlich In The First Decade Of 20th Century . Paul Ehrlich
(1854-1915) Was One Of The Earliest Pioneers In The Field Of Antimicrobial Chemotherapy .1Ehrlich
Formulated The Principles Of “Selective Toxicity” ,I.E; Selective Inhibition Of The Growth Of Microorganisms
Without Damage To The Host.2 Resistance Has Been Documented Not Only Against Antibiotics Of
Natural And Semi- Synthetic Origin , But Also Against Purely Synthetic Compounds (Flouroquinolone) Or
Those Which Do Not Even Enter The Cells (Vancomycin) .3 However , The Euphoria Over The Potential
Conquest Of Infectious Diseases Was Short-Lived .Almost As Soon As Antibacterial Drugs Were Deployed ,
Bacteria Responded By Manifesting Various Forms Of Resistance.4 Considered As “Wonder Drugs”
Antibiotics Are Often Prescribed Inappropriately And Inadequately And Have Thus Became One Of The
Highly Abused Agents.5
This study analyzed changes in the salivary microbiota of 16 patients with oral squamous cell carcinoma (OSCC), 10 with oral leukoplakia (OLK), and 19 healthy controls (HCs). Nonstimulated saliva samples were collected and the bacterial profiles were analyzed using 16S rRNA sequencing. The results showed that patients with OLK and OSCC had differences in the numbers of bacterial operational taxonomical units and diversity compared to HCs. Specifically, the OLK group had higher bacterial richness than HCs. Further, the proportions of certain bacterial genera like Streptococcus, Bacillus, and Haemophilus differed between the patient and control groups. This suggests that changes in the salivary
The document summarizes a Salmonella outbreak in lorikeets at the San Diego Zoo Safari Park from October 4-20, 2014. It provides details on the outbreak timeline and affected birds. It also reviews immunology concepts, describes how titers can be used to monitor the immune response and vaccine effectiveness, and outlines the park's future monitoring plan which includes monthly blood sampling and booster vaccines every six months.
Joseph Michael Ochieng Poster - Dec Conference - CopyJoseph Michael
This study assessed the efficacy of phage therapy against MRSA infections. The results showed that the isolated phage was specific to S. aureus as it only lysed the S. aureus bacteria and not E. coli. The level of bacterial colony forming units varied depending on phage concentration, demonstrating dose-dependent lysis. Additionally, the phage was able to survive in bacteria-free medium over time, though its numbers declined. These findings indicate that this phage isolate is a promising candidate for phage therapy. In vivo studies of the efficacy of this phage isolate are currently ongoing.
Incidence rate of multidrug-resistant organisms in a tertiary care hospital, ...Apollo Hospitals
Antimicrobial resistance to microorganisms is a growing public health concern globally, especially in developing countries. This study was conducted to study the incidence rate of multidrug-resistant organisms with their antibiotic sensitivity pattern.
Antibiotic resistance is increasing in Gram Negative organisms. It is important to know the antibiogram of the hospital to start empirical therapy. It can serve as a reference to clinician looking for information on antibiotic resistance. A retrospective analysis of the isolates obtained from January 2016 to December 2016 was performed. Samples were processed as per CLSI guideline. A total of 718 isolates were obtained. These were analysed for the prevalence
of MDR/XDR/PDR. It was found that XDR isolates are prevalent in our teaching hospital. The study showed an emergence in pan drug resistant isolates. The knowledge of local antibiogram
along with strong antibiotic stewardship program can help in guiding antibiotic therapy.This reduces antibiotic pressure among organisms and hence development of resistance.
Study of virulence genes in vancomycin resistant Enterococci (vre) from anima...Innspub Net
With Enterococcus species in the leading cause of nosocomial infections and resistance to an array of antibiotics, this study focused to determine the frequency and distribution of vancomycin-resistant Enterococci, the presence of virulence genes and to determine the relative nucleotide sequence relatedness among isolates using 16S rRNA sequence. A random sampling of 120 fecal samples of cattle, poultry, and piggery, and human clinical isolates was analyzed. Standard bacteriological methods were employed in the isolation and characterization of isolates and the disk diffusion method was used in determining their antibiotic resistance profiles. Results showed Enterococcus species in cattle at 100%, followed by clinical isolates at 80%. Vancomycin resistance was observed at high rates in Enterococcus species from human clinical isolates and cattle isolates at 90% and 80% respectively. Multiple antibiotic-resistant isolates yielded twelve resistance profiles and 16S rDNA sequences identified E. faecalis, E. durans, E. mundtii, and Enterococcus sp. Isolates from cattle samples were the most probable source of clinical isolates at 78% homology of conserved regions with the clinical isolates. Virulence determinant genes Asa1 was recorded at66.6%, Cyl at 16.6% and GelE at 8.3% among the isolates. This study established farm animals as possible reservoirs of VRE isolates to man. Hence, healthy and professional practices among animal farmers with antibiotic usage, as well as hygienic and preventive measures among hospital workers are here recommended.
This document provides a literature review on Ebola virus. It discusses the virus's symptoms, transmission, available treatments, and evidence that Ebola may have been present in Africa before the first officially recognized outbreak in 1976. It also summarizes studies that investigated seroprevalence of Ebola antibodies in humans. The document describes two experiments conducted: one to optimize ELISA and Western Blot techniques for detecting mouse monoclonal anti-Ebola antibodies, and another to identify variable epitopes in the Zaire Ebola virus spike glycoprotein using bioinformatics tools. The results of the immunoassays were inconclusive but the variable epitopes analysis confirmed regions with differing amino acids.
Apvs2013 02 merdy et al.-comparison circovac vs competitors on adwg mortality...Merial EMEA
This document reviews 9 publications that compare the efficacy of CIRCOVAC, an inactivated PCV2 vaccine, to 3 competitor vaccines in reducing mortality and improving average daily weight gain in piglets. The studies found that CIRCOVAC was at least as effective as the competitor vaccines in decreasing mortality rates from weaning to slaughter by 3.16-8.5% and increasing average daily weight gain by 633-800 grams per day. In conclusion, CIRCOVAC vaccination in piglets performed as well or better than other PCV2 vaccines in improving production parameters.
This study examined the emergence of Campylobacteriosis in Orlu, Imo State, Nigeria over a 3-year period from 2011-2014. Stool, water, beef, and chicken samples were tested for the presence of Campylobacter jejuni and Salmonella species. The results showed increasing prevalence of C. jejuni over the study period, with the highest levels found in beef samples. Antibiotic susceptibility testing found that C. jejuni isolates were most susceptible to Ceftriaxone and least susceptible to Tetracycline. Overall, the results indicate that Campylobacteriosis is an emerging public health issue in the study location.
Excretion of antibiotic resistance genes by dairy calves fed milk replacers w...Partha Ray
This study examined the effects of feeding dairy calves milk replacer with varying doses of antibiotics on the establishment of antibiotic resistance genes (ARGs) in their feces. Twenty-eight calves were assigned to receive milk replacer containing no antibiotics (control), subtherapeutic doses, or therapeutic doses of tetracycline and neomycin. Fecal samples were collected at weeks 6, 7, and 12 and analyzed for ARGs using quantitative PCR. Surprisingly, antibiotic treatment had little effect on ARG levels, except for slightly higher levels of one tetracycline resistance gene in the highest antibiotic dose group. Several ARGs increased over time in all calves. While antibiotics provided no health benefits, the intensive feeding program used may have overridden any effects
1) The study compared measurements of yeast viability, vitality, and cell counts using a Nexcelom Cellometer and flow cytometry.
2) Yeast samples were taken from a brewery and tested using both instruments.
3) Results showed that the Cellometer consistently overestimated cell counts, viability, and vitality compared to flow cytometry. The percentages measured by the Cellometer exceeded 100%, indicating it was not accurately accounting for all cells.
4) While the Cellometer is more affordable and accessible, the study suggests it may overestimate measurements and could result in underpitching yeast. Further research is needed to reduce error and improve accuracy of these instruments.
Antimicrobial drug resistance pattern of bacteria isolated from cases of abor...Bhoj Raj Singh
Most common causes of abortion and miscarriages include genetic abnormalities in embryo, congenital malformations, immune causes, hormonal causes and infections.
Infections are the least responsible but the most important being extrinsic cause of abortions and thus treatable.
Among the causes of reproductive tract infections commonest are bacteria followed by virus and parasites.
Bacterial infections affect prospective mother right from implantation of the zygote till the postpartum period. Important bacteria are Mycoplasma, Listeria, Salmonella, Brucella and E. coli etc. To treat the bacterial infections antibiotics are the final weapons but proving futile day by day with the emergence of multiple drug resistant (MDR) pathogenic bacteria.
A total of 516 bacterial strains (91 Gram positive and 425 Gram –ve) isolated from cases of abortion (buffaloes 63, cattle 408, goats 14, mares 5, sows 5 and bitches 2) and metritis (bitches 17, buffaloes 2) in animals were tested for sensitivity to:
15 herbal antimicrobials (essential oils of Zanthoxylum rhetsa, Thyme, lemon grass, sandal wood, ajowan, betel leaf, guggul, cinnamon, agar wood, holy basil, patchouli and methanolic extract of Zanthoxylum rhetsa, and three active compounds from herbs viz., carvacrol, cinnamledehyde and citral) and
33 antibiotics (amoxycillin, amoxycillin clavulanic acid, ampicillin, azithromycin, aztreonam cefepime, cefotaxime, cefotaxime clavulanic acid, cefoxitin, ceftazidime, ceftazidime clavulanic acid, ceftriaxone, chloramphenicol, ciprofloxacin, clindamycin, colistin, cotrimoxazole, erythromycin, gentamicin, imipenem, meropenem, moxalactam, nalidixic acid, nitrofurantoin, novobiocin, penicillin, piperacillin, v tazobactam, polymyxin B sulphate , streptomycin, tigecycline and vancomycin) using disc diffusion assay.
To determine extended spectrum β-lactamase and mettalo β-lactamase production specific E-test and polymerase chain reaction assays were performed.
Bacteria belonging to 37 genera were identified from aborted foetal tissues or membranes (497) and bacteria of 6 genera from cases of metritis (19). The 10 most common genera of bacteria associated with abortion were Escherichia (117), Aeromonas (50), Enterobacter (46), Streptococcus (36), Brucella (32), Klebsiella (26), Staphylococcus (22), Alcaligenes (20), Moraxella (19) and Acinetobacter (17).
The bacteria associated with metritis were Staphylococcus (10), Bacillus spp., (2), Enterobacter spp. (1), Escherichia coli (4), Streptococcus milleri (1) and Vibrio alginolyticus (1).
Conclusion: Some of the herbal antimicrobial is as good as antibiotics or even better, the question is how we can use these to alleviate the infections of reproductive tract. In vitro studies are just indicative and real picture may be lucid after in vivo studies for which a concerted one health study is the need of the day.
Pathogen detection is a critical in food safety
Escherichia coli and methicillin resistant
Staphylococcus aureus
Culture-colony counting methods. (1)
There are following methods. (1)
Polymerase chain reaction (PCR)
Immunology
These methods can provide following data:
sensitive, qualitative, and quantitative data on the microorganisms being analyzed.
However, they can also be:
Expensive, require specialized equipment specially trained staff,
Be time-consuming as they often require an initial enrichment. (3,2)
Overcome these deficiencies,
Biosensor technology has grown exponentialy
It provides sensitive and reliable results
Surface enhanced Raman scattering (SERS) is
an ultrasensitive and selective analytical technique.
It is used to detect target molecules attached to
surface of noble metal nanoparticles
Commonly, silver and gold are used.(4)
SERS bionanosensor is rapid.
Sensitive.
Detecting multiple bacterial pathogens simultaneously.
Isolating multiple bacterial pathogens.
Repurposing large datasets for exposomic discovery in diseaseChirag Patel
This document discusses the need for large-scale studies of environmental exposures (the exposome) analogous to genome-wide association studies (GWAS) to better understand environmental contributions to health and disease. It notes that while genetics research has made great strides with GWAS, understanding of environmental influences lacks comparable methods and data. The author argues that characterizing the exposome through high-throughput methods could discover new environmental factors in phenotypes, as GWAS did for genetics. National Health and Nutrition Examination Survey is presented as a model for collecting comprehensive human exposure data on a large scale.
This document summarizes a study that aimed to detect Staphylococcus aureus (S. aureus) in chicken meat samples using various detection methods, including biochemical tests, latex agglutination, and the VIDAS Immuno Diagnostic Assay System (VIDAS). The study analyzed 100 chicken breast samples collected from supermarkets in Baghdad, Iraq. The results showed that 60% of samples were contaminated with S. aureus and contained toxins A, B, and C at concentrations ranging from 0.25-2.00 ng g-1. Toxin A was found at the highest concentrations, even at lower bacterial levels (104-105 CFU ml-1) compared to other studies. The VID
This document summarizes a study on enteric fever in Cambodian children. The study found that between 2007-2011:
- Salmonella was isolated from the blood of 162 children, with 151 cases of enteric fever (148 S. Typhi, 3 S. Paratyphi A)
- 85% of S. Typhi isolates were multidrug-resistant and 90% had intermediate resistance to ciprofloxacin
- Complications occurred in 29% of enteric fever cases and 1.6% of cases were fatal
- Genotyping found 98% of S. Typhi isolates belonged to the multidrug-resistant H58 haplotype
This document describes a study that isolated and identified Staphylococci bacteria from 100 bovine mastitic milk samples in River Nile State, Sudan. A total of 133 staphylococci isolates were recovered, of which 35 (26.3%) were coagulase-positive Staphylococcus aureus and 98 (73.7%) were coagulase-negative. The most common coagulase-negative species isolated were S. epidermidis, S. chromogenes, S. capitis subsp. ureolyticus, S. haemolyticus, and S. hyicus. The findings indicate a high prevalence of staphylococci, particularly coagulase-negative species,
Occurrence and antimicrobial resistance of Escherichia coli O157: H7 and Salm...ILRI
Poster prepared by Diriba Hunduma, Silvia Alonso, Getahun Agga, Oudessa Kerro Dego, Barbara Wieland, Hiwot Desta, Delia Grace and Kebede Amenu for the International Association for Food Protection Workshop, Kentucky, 21 – 24 July 2019
This study investigated antibiotic resistance of bacteria isolated from dairy cow milk samples in Shiraz, Iran. Milk samples were taken from 100 cows and cultured if somatic cell count was over 100,000 cells/mL. The two most isolated bacteria were Staphylococcus spp. (37.61%) and Streptococcus spp. (36.69%). These bacteria showed the highest resistance to penicillin and cloxacillin. Minimum inhibitory concentration tests found Staphylococcus spp. were largely resistant to commonly used mastitis antibiotics like penicillin, tetracycline, and oxacillin at low concentrations. The study highlights the role of hygiene and prudent antibiotic use in mastitis control and prevention to
This document summarizes studies evaluating the performance of 3M molecular detection assays for Salmonella and E. coli O157. It describes inclusivity and exclusivity testing showing the assays can accurately detect target pathogens. Food, environmental and carcass samples were tested to evaluate assay compatibility in various matrices. Results demonstrated high accuracy, specificity and sensitivity without inhibition across sample types.
This document summarizes a study on multidrug resistant organisms and their antibiotic resistance patterns among intensive care unit patients in Surat City, India. The study found that Pseudomonas aeruginosa and Klebsiella species were the most common causes of healthcare-associated infections. It also found high resistance of these organisms to cephalosporins but that amikacin and imipenem were the most effective antibiotics. Regular monitoring of resistance patterns was deemed important for guiding empirical treatment of infections in ICU patients.
Antibiotic Susceptibility Pattern of Pyogenic Bacterial Isolates in Sputum.IOSR Journals
Drugs Have Been Used For The Treatment Of Infectious Diseases Since 17th Century , However
Chemotherapy As A Science Has Began With Paul Ehrlich In The First Decade Of 20th Century . Paul Ehrlich
(1854-1915) Was One Of The Earliest Pioneers In The Field Of Antimicrobial Chemotherapy .1Ehrlich
Formulated The Principles Of “Selective Toxicity” ,I.E; Selective Inhibition Of The Growth Of Microorganisms
Without Damage To The Host.2 Resistance Has Been Documented Not Only Against Antibiotics Of
Natural And Semi- Synthetic Origin , But Also Against Purely Synthetic Compounds (Flouroquinolone) Or
Those Which Do Not Even Enter The Cells (Vancomycin) .3 However , The Euphoria Over The Potential
Conquest Of Infectious Diseases Was Short-Lived .Almost As Soon As Antibacterial Drugs Were Deployed ,
Bacteria Responded By Manifesting Various Forms Of Resistance.4 Considered As “Wonder Drugs”
Antibiotics Are Often Prescribed Inappropriately And Inadequately And Have Thus Became One Of The
Highly Abused Agents.5
This study analyzed changes in the salivary microbiota of 16 patients with oral squamous cell carcinoma (OSCC), 10 with oral leukoplakia (OLK), and 19 healthy controls (HCs). Nonstimulated saliva samples were collected and the bacterial profiles were analyzed using 16S rRNA sequencing. The results showed that patients with OLK and OSCC had differences in the numbers of bacterial operational taxonomical units and diversity compared to HCs. Specifically, the OLK group had higher bacterial richness than HCs. Further, the proportions of certain bacterial genera like Streptococcus, Bacillus, and Haemophilus differed between the patient and control groups. This suggests that changes in the salivary
The document summarizes a Salmonella outbreak in lorikeets at the San Diego Zoo Safari Park from October 4-20, 2014. It provides details on the outbreak timeline and affected birds. It also reviews immunology concepts, describes how titers can be used to monitor the immune response and vaccine effectiveness, and outlines the park's future monitoring plan which includes monthly blood sampling and booster vaccines every six months.
Joseph Michael Ochieng Poster - Dec Conference - CopyJoseph Michael
This study assessed the efficacy of phage therapy against MRSA infections. The results showed that the isolated phage was specific to S. aureus as it only lysed the S. aureus bacteria and not E. coli. The level of bacterial colony forming units varied depending on phage concentration, demonstrating dose-dependent lysis. Additionally, the phage was able to survive in bacteria-free medium over time, though its numbers declined. These findings indicate that this phage isolate is a promising candidate for phage therapy. In vivo studies of the efficacy of this phage isolate are currently ongoing.
Incidence rate of multidrug-resistant organisms in a tertiary care hospital, ...Apollo Hospitals
Antimicrobial resistance to microorganisms is a growing public health concern globally, especially in developing countries. This study was conducted to study the incidence rate of multidrug-resistant organisms with their antibiotic sensitivity pattern.
Antibiotic resistance is increasing in Gram Negative organisms. It is important to know the antibiogram of the hospital to start empirical therapy. It can serve as a reference to clinician looking for information on antibiotic resistance. A retrospective analysis of the isolates obtained from January 2016 to December 2016 was performed. Samples were processed as per CLSI guideline. A total of 718 isolates were obtained. These were analysed for the prevalence
of MDR/XDR/PDR. It was found that XDR isolates are prevalent in our teaching hospital. The study showed an emergence in pan drug resistant isolates. The knowledge of local antibiogram
along with strong antibiotic stewardship program can help in guiding antibiotic therapy.This reduces antibiotic pressure among organisms and hence development of resistance.
Study of virulence genes in vancomycin resistant Enterococci (vre) from anima...Innspub Net
With Enterococcus species in the leading cause of nosocomial infections and resistance to an array of antibiotics, this study focused to determine the frequency and distribution of vancomycin-resistant Enterococci, the presence of virulence genes and to determine the relative nucleotide sequence relatedness among isolates using 16S rRNA sequence. A random sampling of 120 fecal samples of cattle, poultry, and piggery, and human clinical isolates was analyzed. Standard bacteriological methods were employed in the isolation and characterization of isolates and the disk diffusion method was used in determining their antibiotic resistance profiles. Results showed Enterococcus species in cattle at 100%, followed by clinical isolates at 80%. Vancomycin resistance was observed at high rates in Enterococcus species from human clinical isolates and cattle isolates at 90% and 80% respectively. Multiple antibiotic-resistant isolates yielded twelve resistance profiles and 16S rDNA sequences identified E. faecalis, E. durans, E. mundtii, and Enterococcus sp. Isolates from cattle samples were the most probable source of clinical isolates at 78% homology of conserved regions with the clinical isolates. Virulence determinant genes Asa1 was recorded at66.6%, Cyl at 16.6% and GelE at 8.3% among the isolates. This study established farm animals as possible reservoirs of VRE isolates to man. Hence, healthy and professional practices among animal farmers with antibiotic usage, as well as hygienic and preventive measures among hospital workers are here recommended.
This document provides a literature review on Ebola virus. It discusses the virus's symptoms, transmission, available treatments, and evidence that Ebola may have been present in Africa before the first officially recognized outbreak in 1976. It also summarizes studies that investigated seroprevalence of Ebola antibodies in humans. The document describes two experiments conducted: one to optimize ELISA and Western Blot techniques for detecting mouse monoclonal anti-Ebola antibodies, and another to identify variable epitopes in the Zaire Ebola virus spike glycoprotein using bioinformatics tools. The results of the immunoassays were inconclusive but the variable epitopes analysis confirmed regions with differing amino acids.
Apvs2013 02 merdy et al.-comparison circovac vs competitors on adwg mortality...Merial EMEA
This document reviews 9 publications that compare the efficacy of CIRCOVAC, an inactivated PCV2 vaccine, to 3 competitor vaccines in reducing mortality and improving average daily weight gain in piglets. The studies found that CIRCOVAC was at least as effective as the competitor vaccines in decreasing mortality rates from weaning to slaughter by 3.16-8.5% and increasing average daily weight gain by 633-800 grams per day. In conclusion, CIRCOVAC vaccination in piglets performed as well or better than other PCV2 vaccines in improving production parameters.
This study examined the emergence of Campylobacteriosis in Orlu, Imo State, Nigeria over a 3-year period from 2011-2014. Stool, water, beef, and chicken samples were tested for the presence of Campylobacter jejuni and Salmonella species. The results showed increasing prevalence of C. jejuni over the study period, with the highest levels found in beef samples. Antibiotic susceptibility testing found that C. jejuni isolates were most susceptible to Ceftriaxone and least susceptible to Tetracycline. Overall, the results indicate that Campylobacteriosis is an emerging public health issue in the study location.
Excretion of antibiotic resistance genes by dairy calves fed milk replacers w...Partha Ray
This study examined the effects of feeding dairy calves milk replacer with varying doses of antibiotics on the establishment of antibiotic resistance genes (ARGs) in their feces. Twenty-eight calves were assigned to receive milk replacer containing no antibiotics (control), subtherapeutic doses, or therapeutic doses of tetracycline and neomycin. Fecal samples were collected at weeks 6, 7, and 12 and analyzed for ARGs using quantitative PCR. Surprisingly, antibiotic treatment had little effect on ARG levels, except for slightly higher levels of one tetracycline resistance gene in the highest antibiotic dose group. Several ARGs increased over time in all calves. While antibiotics provided no health benefits, the intensive feeding program used may have overridden any effects
1) The study compared measurements of yeast viability, vitality, and cell counts using a Nexcelom Cellometer and flow cytometry.
2) Yeast samples were taken from a brewery and tested using both instruments.
3) Results showed that the Cellometer consistently overestimated cell counts, viability, and vitality compared to flow cytometry. The percentages measured by the Cellometer exceeded 100%, indicating it was not accurately accounting for all cells.
4) While the Cellometer is more affordable and accessible, the study suggests it may overestimate measurements and could result in underpitching yeast. Further research is needed to reduce error and improve accuracy of these instruments.
Antimicrobial drug resistance pattern of bacteria isolated from cases of abor...Bhoj Raj Singh
Most common causes of abortion and miscarriages include genetic abnormalities in embryo, congenital malformations, immune causes, hormonal causes and infections.
Infections are the least responsible but the most important being extrinsic cause of abortions and thus treatable.
Among the causes of reproductive tract infections commonest are bacteria followed by virus and parasites.
Bacterial infections affect prospective mother right from implantation of the zygote till the postpartum period. Important bacteria are Mycoplasma, Listeria, Salmonella, Brucella and E. coli etc. To treat the bacterial infections antibiotics are the final weapons but proving futile day by day with the emergence of multiple drug resistant (MDR) pathogenic bacteria.
A total of 516 bacterial strains (91 Gram positive and 425 Gram –ve) isolated from cases of abortion (buffaloes 63, cattle 408, goats 14, mares 5, sows 5 and bitches 2) and metritis (bitches 17, buffaloes 2) in animals were tested for sensitivity to:
15 herbal antimicrobials (essential oils of Zanthoxylum rhetsa, Thyme, lemon grass, sandal wood, ajowan, betel leaf, guggul, cinnamon, agar wood, holy basil, patchouli and methanolic extract of Zanthoxylum rhetsa, and three active compounds from herbs viz., carvacrol, cinnamledehyde and citral) and
33 antibiotics (amoxycillin, amoxycillin clavulanic acid, ampicillin, azithromycin, aztreonam cefepime, cefotaxime, cefotaxime clavulanic acid, cefoxitin, ceftazidime, ceftazidime clavulanic acid, ceftriaxone, chloramphenicol, ciprofloxacin, clindamycin, colistin, cotrimoxazole, erythromycin, gentamicin, imipenem, meropenem, moxalactam, nalidixic acid, nitrofurantoin, novobiocin, penicillin, piperacillin, v tazobactam, polymyxin B sulphate , streptomycin, tigecycline and vancomycin) using disc diffusion assay.
To determine extended spectrum β-lactamase and mettalo β-lactamase production specific E-test and polymerase chain reaction assays were performed.
Bacteria belonging to 37 genera were identified from aborted foetal tissues or membranes (497) and bacteria of 6 genera from cases of metritis (19). The 10 most common genera of bacteria associated with abortion were Escherichia (117), Aeromonas (50), Enterobacter (46), Streptococcus (36), Brucella (32), Klebsiella (26), Staphylococcus (22), Alcaligenes (20), Moraxella (19) and Acinetobacter (17).
The bacteria associated with metritis were Staphylococcus (10), Bacillus spp., (2), Enterobacter spp. (1), Escherichia coli (4), Streptococcus milleri (1) and Vibrio alginolyticus (1).
Conclusion: Some of the herbal antimicrobial is as good as antibiotics or even better, the question is how we can use these to alleviate the infections of reproductive tract. In vitro studies are just indicative and real picture may be lucid after in vivo studies for which a concerted one health study is the need of the day.
Pathogen detection is a critical in food safety
Escherichia coli and methicillin resistant
Staphylococcus aureus
Culture-colony counting methods. (1)
There are following methods. (1)
Polymerase chain reaction (PCR)
Immunology
These methods can provide following data:
sensitive, qualitative, and quantitative data on the microorganisms being analyzed.
However, they can also be:
Expensive, require specialized equipment specially trained staff,
Be time-consuming as they often require an initial enrichment. (3,2)
Overcome these deficiencies,
Biosensor technology has grown exponentialy
It provides sensitive and reliable results
Surface enhanced Raman scattering (SERS) is
an ultrasensitive and selective analytical technique.
It is used to detect target molecules attached to
surface of noble metal nanoparticles
Commonly, silver and gold are used.(4)
SERS bionanosensor is rapid.
Sensitive.
Detecting multiple bacterial pathogens simultaneously.
Isolating multiple bacterial pathogens.
Repurposing large datasets for exposomic discovery in diseaseChirag Patel
This document discusses the need for large-scale studies of environmental exposures (the exposome) analogous to genome-wide association studies (GWAS) to better understand environmental contributions to health and disease. It notes that while genetics research has made great strides with GWAS, understanding of environmental influences lacks comparable methods and data. The author argues that characterizing the exposome through high-throughput methods could discover new environmental factors in phenotypes, as GWAS did for genetics. National Health and Nutrition Examination Survey is presented as a model for collecting comprehensive human exposure data on a large scale.
This document summarizes a study that aimed to detect Staphylococcus aureus (S. aureus) in chicken meat samples using various detection methods, including biochemical tests, latex agglutination, and the VIDAS Immuno Diagnostic Assay System (VIDAS). The study analyzed 100 chicken breast samples collected from supermarkets in Baghdad, Iraq. The results showed that 60% of samples were contaminated with S. aureus and contained toxins A, B, and C at concentrations ranging from 0.25-2.00 ng g-1. Toxin A was found at the highest concentrations, even at lower bacterial levels (104-105 CFU ml-1) compared to other studies. The VID
This document summarizes a study on enteric fever in Cambodian children. The study found that between 2007-2011:
- Salmonella was isolated from the blood of 162 children, with 151 cases of enteric fever (148 S. Typhi, 3 S. Paratyphi A)
- 85% of S. Typhi isolates were multidrug-resistant and 90% had intermediate resistance to ciprofloxacin
- Complications occurred in 29% of enteric fever cases and 1.6% of cases were fatal
- Genotyping found 98% of S. Typhi isolates belonged to the multidrug-resistant H58 haplotype
Similar to Occurrence of multidrug resistant Staphylococcus aureus in bovine milk, a pilot study conducted at Veterinary Investigation Laboratory-Eldoret, Kenya
This document describes a study that isolated and identified Staphylococci bacteria from 100 bovine mastitic milk samples in River Nile State, Sudan. A total of 133 staphylococci isolates were recovered, of which 35 (26.3%) were coagulase-positive Staphylococcus aureus and 98 (73.7%) were coagulase-negative. The most common coagulase-negative species isolated were S. epidermidis, S. chromogenes, S. capitis subsp. ureolyticus, S. haemolyticus, and S. hyicus. The findings indicate a high prevalence of staphylococci, particularly coagulase-negative species,
Occurrence and antimicrobial resistance of Escherichia coli O157: H7 and Salm...ILRI
Poster prepared by Diriba Hunduma, Silvia Alonso, Getahun Agga, Oudessa Kerro Dego, Barbara Wieland, Hiwot Desta, Delia Grace and Kebede Amenu for the International Association for Food Protection Workshop, Kentucky, 21 – 24 July 2019
This study investigated antibiotic resistance of bacteria isolated from dairy cow milk samples in Shiraz, Iran. Milk samples were taken from 100 cows and cultured if somatic cell count was over 100,000 cells/mL. The two most isolated bacteria were Staphylococcus spp. (37.61%) and Streptococcus spp. (36.69%). These bacteria showed the highest resistance to penicillin and cloxacillin. Minimum inhibitory concentration tests found Staphylococcus spp. were largely resistant to commonly used mastitis antibiotics like penicillin, tetracycline, and oxacillin at low concentrations. The study highlights the role of hygiene and prudent antibiotic use in mastitis control and prevention to
This document summarizes studies evaluating the performance of 3M molecular detection assays for Salmonella and E. coli O157. It describes inclusivity and exclusivity testing showing the assays can accurately detect target pathogens. Food, environmental and carcass samples were tested to evaluate assay compatibility in various matrices. Results demonstrated high accuracy, specificity and sensitivity without inhibition across sample types.
Effect of flax seeds (linum usitatissimum) on uterine andDr Asif Ahmad
This study investigated the effects of an aqueous methanolic extract of flax seeds (Linum usitatissimum) on puberty in immature female mice. Mice were orally administered doses of 100, 200, or 300 mg/kg of the flax seed extract or distilled water (control) daily for 25 days. Higher doses of the extract increased body, ovarian, and uterine weights compared to controls. Ovarian and uterine protein contents increased while ovarian cholesterol decreased with higher extract doses. Serum estradiol levels peaked earlier in extract-treated mice. Vaginal opening and first estrus occurred at an earlier age in mice given higher extract doses, indicating enhanced onset of puberty.
This study assessed the risks posed by Staphylococcus aureus and Listeria monocytogenes in raw milk cheese. The study found that the risk from S. aureus is low, as isolates did not produce toxins commonly associated with food poisoning. Some isolates produced Staphylococcal enterotoxin C, which is generally not food-associated. The risk from L. monocytogenes was found to be higher, as it was isolated from the raw milk of one cow and its numbers increased during cheesemaking, though no growth was observed. The study provides useful information for raw milk cheesemakers and regulators on managing food safety risks.
This document summarizes a study that detected bovine tuberculosis in milk and serum samples from dairy farm animals in Assiut City, Egypt. Several methods were used for detection, including the tuberculin skin test, microscopic examination using Ziehl-Neelsen staining, bacterial culture using Lowenstein Jensen media, and an ELISA test using bovine PPD as the coating antigen. Acid-fast bacilli were detected microscopically in 7% of milk samples from tuberculin-positive reactors and 3% from tuberculin-negative reactors. Mycobacteria were isolated via culture from 3-4% of milk samples from tuberculin-positive reactors and 1-2% from negative reactors
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
This document summarizes mastitis, an inflammation of the mammary gland and udder tissue in dairy cattle. It is usually caused by bacterial infection entering through the teat canal. Common bacteria that cause mastitis include Streptococcus agalactiae, Streptococcus dysgalactiae, Staphylococcus aureus, E. coli, and Pseudomonas aeruginosa. Symptoms include changes to the udder like swelling and milk like flakes or pus. Mastitis results in economic losses due to reduced milk yield and quality, extra labor and veterinary costs, and premature culling of infected cows. Prevention focuses on hygienic milking practices and dry cow therapy with antibiotics to treat infections.
This study investigated the prevalence of Pseudomonas species in raw cow and buffalo milk samples from Assiut, Egypt. Pseudomonas was found in 40% of cow milk samples and 50% of buffalo milk samples. Five Pseudomonas species were identified: P. aeruginosa, P. fluorescens, P. putida, P. cepacia, and P. stutzeri. The study also examined the effect of storage temperature (4°C and -18°C) on the growth and protease/lipase enzyme activity of Pseudomonas isolates over 14 days. Pseudomonas grew continuously at 4°C for 7 days then was destroyed, while at -18°C growth and enzyme
Evaluation of a model for o157 h7 colonization in strep treated adult cattleAndrew Fabich
OBJECTIVE:
To develop a repeatable model for studying colonization with streptomycin-resistant Escherichia coli O157:H7 in adult cattle.
ANIMALS:
5 adult mixed-breed beef cattle.
PROCEDURES:
Cattle were surgically cannulated in the duodenum, treated daily with streptomycin (33 mg/kg) via the duodenal cannula prior to and during experimental colonizations, and colonized with 10(10) CFUs of streptomycin-resistant E coli O157:H7 via the duodenal cannula. Colonization of rectal mucus and shedding in feces were monitored. Antimicrobials were administered to eliminate the colonizing strain so that 5 repeated colonization experiments could be performed. A comprehensive analysis of colonization was performed at necropsy.
RESULTS:
Streptomycin treatment resulted in improved experimental colonization variables, compared with untreated controls, during initiation (days 2 to 6) and early maintenance (days 7 to 12) of colonization. Elimination of the colonizing strain followed by 5 repeated colonizations in the same animals indicated the repeatability of the protocol. Positive results of bacteriologic culture of feces 7 and 12 days after colonization were obtained in 100% and 84% of samples, respectively, across all animals and trials. At necropsy, highest magnitude recovery was in terminal rectal mucus.
CONCLUSIONS AND CLINICAL RELEVANCE:
The model was highly repeatable and novel with respect to streptomycin treatment, use of duodenal cannulas, and repeated colonizations of the same animals. Its use in adult cattle, from which most bovine-derived food originates, is critical to the study of preharvest food safety. The findings have implications for understanding intermittency of shedding in the field and for proposed vaccine-based interventions.
This document summarizes a study on the microbial quality of raw milk samples collected from four locations in Abia State, Nigeria. A variety of bacteria (Escherichia coli, Staphylococcus aureus, Streptococcus spp.) and fungi (Candida spp, Mucor spp.) were isolated from the milk samples. The total bacterial counts ranged from 9.88 x 107 to 1.26 x 108 cfu/ml across samples. The coliform, staphylococcal, and fungal counts also varied between locations. The milk from the university farm location had lower microbial loads compared to milk from other commercial sources, likely due to better hygienic practices on the university farm.
This study investigated the effects of increasing dietary selenium intake through selenized milk casein on human breast cancer tumor progression in mice. Mice were fed diets containing 0.16, 0.51, 0.85, or 1.15 ppm selenium from selenized milk casein and inoculated with human breast cancer cells. Tumor growth was monitored over 10 weeks. Results showed that higher selenium intake from selenized casein was associated with smaller final tumor volumes and slower tumor growth rates. Specifically, tumors in mice consuming 1.15 ppm selenium were 35% smaller than those consuming 0.16 ppm. Higher selenium intake also resulted in more apoptotic cells in tumors and slower predicted tumor growth, suggesting
THE ANTI CANCER EFFECTS OF TUALANG HONEY IN MODULATING BREAST CARCINOGENESISG AARATHILFA
PAPER PRESENTATION SKILLS.
CHECK OUT MY SLIDES ON A SCIENTIFIC PAPER DONE BY SARFRAZ AHMED AND NOR HAYATI OTHMAN.
THS PRESENTATION WAS DONE BY ME DURING MY FIRST SEMESTER OF MASTER'S DEGREE.
WE MAY COME ACROSS MANY RESEARCH PAPERS, HOWEVER IN FUTURE WHEN WE ARE PRESENTING OUR DOCTORATE VIVA PRESENTATION, WE SHOULD HAVE A BASIC KNOWLEDGE ON IT. HAVE A GLANCE FOR YOUR REFERENCE
Breif discussion about the organism and food through which the outbreaks have occured. It is also added with Bacteriological Analytical Methods (BAM) for the isolation and enumeration of the organism from the food sample.
Effects of feeding a saccharomyces cerevisiaeRahardi Gautama
1) The study evaluated the effects of feeding a Saccharomyces cerevisiae fermentation prototype without antibiotics on the performance, health and carcass characteristics of beef heifers compared to a control diet containing antibiotics.
2) 1,495 crossbred heifers were fed one of two diets - a control diet containing monensin, tylosin and direct-fed microbials, or a diet containing an Saccharomyces cerevisiae fermentation prototype without antibiotics.
3) There were no differences between the diets for growth performance, carcass characteristics, morbidity or mortality. Heifers fed the prototype diet had numerically fewer liver abscesses. Replacing antibiotics with the fermentation prototype
1. A study investigated the anti-cancer properties of camel urine in vitro. Camel urine was found to inhibit cell proliferation and induce apoptosis in various human cancer cell lines through the intrinsic apoptosis pathway.
2. Camel urine downregulated several cancer-promoting proteins and upregulated a cyclin-dependent kinase inhibitor. It also had no cytotoxic effects on immune cells and stimulated immune responses by inducing an anti-tumor cytokine and inhibiting pro-tumor cytokines.
3. The results suggest that components in camel urine have specific and efficient anti-cancer effects in vitro as well as immune-modulating properties, providing a potential basis for the ethnopharmacological use of camel urine to treat cancer.
Detection of the Antibacterial Activity of Bioactive Peptide Isolated from Fe...iosrjce
IOSR Journal of Pharmacy and Biological Sciences(IOSR-JPBS) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Pharmacy and Biological Science. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Pharmacy and Biological Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Application of MALDI-TOF Mass Spectrometry for the Assessment of Prevalence o...Dr. Rahul Suryawanshi
Background: Foodborne infections like Listeriosis cover several disorders and are a worldwide public health emergency. Listeria monocytogenes has been isolated from various foodstuffs, including milk and fishes. MALDI-TOF mass spectrometry technique is known for its rapid and accurate identification of bacterial organisms.
Methods: In the current research, a total of 360 samples comprising raw milk (130), milk products (125) and freshwater fishes (105) were screened for the detection of pathogenic Listeria species by using the USDA method. The recovered Listeria isolates were characterized using conventional set of biochemical analysis along with sugar fermentation tests and further confirmed by MALDI-TOF MS. The virulent nature of pathogenic Listeria isolates was also assessed by in vitro tests like hemolysis on blood agar, CAMP and PI-PLC assay.
Result: In current study, on screening 360 animal origin food samples, three isolates were recovered from raw milk samples and identified as Listeria monocytogenes indicating an overall prevalence of Listeria monocytogenes to the tune of 0.83%. Excellent correlation was observed with identification of Listeria species using conventional phenotypic tests and advanced molecular tool Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry (MALDI-TOF MS) technique. The results depict dependability of advanced technique for rapid and reliable identification of Listeria species.
Similar to Occurrence of multidrug resistant Staphylococcus aureus in bovine milk, a pilot study conducted at Veterinary Investigation Laboratory-Eldoret, Kenya (20)
Small ruminant keepers’ knowledge, attitudes and practices towards peste des ...ILRI
Presentation by Guy Ilboudo, Abel Sènabgè Biguezoton, Cheick Abou Kounta Sidibé, Modou Moustapha Lo, Zoë Campbell and Michel Dione at the 6th Peste des Petits Ruminants Global Research and Expertise Networks (PPR-GREN) annual meeting, Bengaluru, India, 28–30 November 2023.
Small ruminant keepers’ knowledge, attitudes and practices towards peste des ...ILRI
Poster by Guy Ilboudo, Abel Sènabgè Biguezoton, Cheick Abou Kounta Sidibé, Modou Moustapha Lo, Zoë Campbell and Michel Dione presented at the 6th Peste des Petits Ruminants Global Research and Expertise Networks (PPR-GREN) annual meeting, Bengaluru, India, 29 November 2023.
A training, certification and marketing scheme for informal dairy vendors in ...ILRI
Presentation by Silvia Alonso, Jef L. Leroy, Emmanuel Muunda, Moira Donahue Angel, Emily Kilonzi, Giordano Palloni, Gideon Kiarie, Paula Dominguez-Salas and Delia Grace at the Micronutrient Forum 6th Global Conference, The Hague, Netherlands, 16 October 2023.
Milk safety and child nutrition impacts of the MoreMilk training, certificati...ILRI
Poster by Silvia Alonso, Emmanuel Muunda, Moira Donahue Angel, Emily Kilonzi, Giordano Palloni, Gideon Kiarie, Paula Dominguez-Salas, Delia Grace and Jef L. Leroy presented at the Micronutrient Forum 6th Global Conference, The Hague, Netherlands, 16 October 2023.
Preventing the next pandemic: a 12-slide primer on emerging zoonotic diseasesILRI
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help boost feelings of calmness, happiness and focus.
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The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
Preventing a post-antibiotic era: a 12-slide primer on antimicrobial resistanceILRI
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise boosts blood flow, releases endorphins, and promotes changes in the brain which help enhance one's emotional well-being and mental clarity.
Food safety research in low- and middle-income countriesILRI
Presentation by Hung Nguyen-Viet at the first technical meeting to launch the Food Safety Working Group under the One Health Partnership framework, Hanoi, Vietnam, 28 September 2023
The Food Safety Working Group (FSWG) in Vietnam was created in 2015 at the request of the Deputy Prime Minister to address food safety issues in the country. It brings together government agencies, ministries, and development partners to facilitate joint policy dialogue and improve food safety. Over eight years of operations led by different organizations, the FSWG has contributed to various initiatives. However, it faces challenges of diminished government participation over time and dependence on active members. Going forward, it will strengthen its operations by integrating under Vietnam's One Health Partnership framework to better engage stakeholders and achieve policy impacts.
Reservoirs of pathogenic Leptospira species in UgandaILRI
Presentation by Lordrick Alinaitwe, Martin Wainaina, Salome Dürr, Clovice Kankya, Velma Kivali, James Bugeza, Martin Richter, Kristina Roesel, Annie Cook and Anne Mayer-Scholl at the University of Bern Graduate School for Cellular and Biomedical Sciences Symposium, Bern, Switzerland, 29 June 2023.
Assessing meat microbiological safety and associated handling practices in bu...ILRI
Presentation by Patricia Koech, Winnie Ogutu, Linnet Ochieng, Delia Grace, George Gitao, Lily Bebora, Max Korir, Florence Mutua and Arshnee Moodley at the 8th All Africa Conference on Animal Agriculture, Gaborone, Botswana, 26–29 September 2023.
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Practices and drivers of antibiotic use in Kenyan smallholder dairy farmsILRI
Poster by Lydiah Kisoo, Dishon M. Muloi, Walter Oguta, Daisy Ronoh, Lynn Kirwa, James Akoko, Eric Fèvre, Arshnee Moodley and Lillian Wambua presented at Tropentag 2023, Berlin, Germany, 20–22 September 2023.
PPT on Direct Seeded Rice presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
The binding of cosmological structures by massless topological defectsSérgio Sacani
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Travis Hills of MN is Making Clean Water Accessible to All Through High Flux ...Travis Hills MN
By harnessing the power of High Flux Vacuum Membrane Distillation, Travis Hills from MN envisions a future where clean and safe drinking water is accessible to all, regardless of geographical location or economic status.
Immersive Learning That Works: Research Grounding and Paths ForwardLeonel Morgado
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
The debris of the ‘last major merger’ is dynamically youngSérgio Sacani
The Milky Way’s (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the
‘last major merger.’ Hypotheses for the origin of this component include Gaia-Sausage/Enceladus (GSE), where the progenitor
collided with the MW proto-disc 8–11 Gyr ago, and the Virgo Radial Merger (VRM), where the progenitor collided with the
MW disc within the last 3 Gyr. These two scenarios make different predictions about observable structure in local phase space,
because the morphology of debris depends on how long it has had to phase mix. The recently identified phase-space folds in Gaia
DR3 have positive caustic velocities, making them fundamentally different than the phase-mixed chevrons found in simulations
at late times. Roughly 20 per cent of the stars in the prograde local stellar halo are associated with the observed caustics. Based
on a simple phase-mixing model, the observed number of caustics are consistent with a merger that occurred 1–2 Gyr ago.
We also compare the observed phase-space distribution to FIRE-2 Latte simulations of GSE-like mergers, using a quantitative
measurement of phase mixing (2D causticality). The observed local phase-space distribution best matches the simulated data
1–2 Gyr after collision, and certainly not later than 3 Gyr. This is further evidence that the progenitor of the ‘last major merger’
did not collide with the MW proto-disc at early times, as is thought for the GSE, but instead collided with the MW disc within
the last few Gyr, consistent with the body of work surrounding the VRM.
When I was asked to give a companion lecture in support of ‘The Philosophy of Science’ (https://shorturl.at/4pUXz) I decided not to walk through the detail of the many methodologies in order of use. Instead, I chose to employ a long standing, and ongoing, scientific development as an exemplar. And so, I chose the ever evolving story of Thermodynamics as a scientific investigation at its best.
Conducted over a period of >200 years, Thermodynamics R&D, and application, benefitted from the highest levels of professionalism, collaboration, and technical thoroughness. New layers of application, methodology, and practice were made possible by the progressive advance of technology. In turn, this has seen measurement and modelling accuracy continually improved at a micro and macro level.
Perhaps most importantly, Thermodynamics rapidly became a primary tool in the advance of applied science/engineering/technology, spanning micro-tech, to aerospace and cosmology. I can think of no better a story to illustrate the breadth of scientific methodologies and applications at their best.
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdfSelcen Ozturkcan
Ozturkcan, S., Berndt, A., & Angelakis, A. (2024). Mending clothing to support sustainable fashion. Presented at the 31st Annual Conference by the Consortium for International Marketing Research (CIMaR), 10-13 Jun 2024, University of Gävle, Sweden.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...Sérgio Sacani
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Occurrence of multidrug resistant Staphylococcus aureus in bovine milk, a pilot study conducted at Veterinary Investigation Laboratory-Eldoret, Kenya
1. Otin, J1., Loye, C2., and Oduori DO.1
Materials & Methods
Forty-five milk samples, were sourced from dairy cows located in
different farms within Uasin Gishu County. They were collected
using sterilized tubes, transported to a laboratory and incubated at
37°C for 2 hours, cultured in 5% sheep blood agar, and MSA by
spreading method. Pure culture of S. aureus was obtained based
on Beta-hemolysis on blood agar, gram staining, biochemical
characteristics, catalase tests as per the procedures by
Cheesbrough (1985).
Sensitivity test was done as per (CLSI, 2012). Discs impregnated
with Amplicillin (Amp), Co-Trimoxazole (CoT), Gentamycin
(Gen), Sulfamethoxazole (Sx), Streptomycin (S), Kanamycin (K),
Tetracycline (Te), Chloramphenicol (C) were used.
Results
27/45, 60% of the milk samples were positive for
S. aureus (Fig. 1). Most of the isolates had high
resistance to Ampicillin 66.7%, and Co-
Trimoxazole 63%, but susceptible to Gentamycin
74%, and Sulfamethoxazole 51.9%. Intermediate
resistance was observed for all antibiotics tested &
ranged from (7.4-40.7%) (Fig. 2).
Resistance to multiple antibiotics was as follows:
1(14.8%), 2(18.5%), 3(25.9%), 4(22.2%),
5(11.1%) antibiotics. Resistance to 6 and 8
antibiotics was (3.7%).
Occurrence of multidrug resistant Staphylococcus aureus in bovine milk, a pilot
study conducted at Veterinary Investigation Laboratory-Eldoret, Kenya
Abstract
Antibiotic resistance is a threat to human and animal health. Staphylococcus aureus is an important reservoir for
antibiotic resistance determinants. Forty-five raw cow milk samples were examined for bacterial contamination by S.
aureus and the prevalence was 60%. Most of the isolates had high resistance to Ampicillin and Co-Trimoxazole but
were susceptible to Gentamycin and Sulfamethoxazole. Resistance to multiple antibiotics was observed
.
Introduction
Antibiotic resistance occurs when microbes evolve mechanisms
protecting them from effects of antimicrobials. As a result, standard
treatment become ineffective, infection persist and may spread to others.
The objective of this study was to detect S. aureus contamination in raw
bovine milk and its antimicrobial resistance profile.
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
Amp Te CoT S Ken Gen Sx C
Sensitivity
R= Resistant, I= Intermediate resistance, S= Susceptible
Graph of antimicrobial susceptibility of Staph. aureus isolates from
raw milk
R I S
One Health Relevance
S. aureus has the capacity to colonize various parts of the human body
and dairy cows leading to a diverse array of diseases. Mastitis is the
common result of infection in animals leading to significant economic
loss. Consumption of milk from infected animals by a human can lead to
infections or intoxications. The zoonotic potential of the pathogen
suggests that effective control can be achieved via a One-Health
approach.
Albeit the limitations in statistical strength, the study intimates an urgent
need for effective preventive measures against mastitis in cattle and
vigilance in antibiotic stewardship.
References
Alexander, T. W., Yanke, L. J., Topp, E., Olson, M. E., Read, R. R., Morck, D.
W., & McAllister, T. A. (2008). Effect of subtherapeutic administration of
antibiotics on the prevalence of antibiotic-resistant Escherichia coli bacteria in
feedlot cattle. Applied and environmental microbiology, 74(14), 4405–4416.
https://doi.org/10.1128/AEM.00489-08
CLSI (2012) Performance standards for antimicrobial susceptibility testing.
Twenty second informational supplement. CLSI document M100-S22. Wayne,
PA: Clinical and Laboratory Standard Institute. Available at
https://clsi.org/media/2663/m100ed29_sample.pdf
1. Maasai Mara University, Narok Kenya, P.O. Box 861 - 20500, Narok, Kenya.
2. Veterinary Investigation Laboratory, Eldoret , Kenya
Fig. 2: The antimicrobial susceptibility profile for 27 isolates of S. aureus
against 8 different antibiotics.
Fig. 1: Prevalence of S. aureus in bovine milk, reported/staggered
over 30 days
70.0
80.0
62.5
37.5 40.0
66.7
60
1-5 6-10 11-15 16-20 21-25 26-30 1-30
Prevalence
(%)
Timeline in days
Prevalence of S. aureus reported during study timeline
n=10
n= 5
n= 8
n= 8 n=5
n=9
n= 45