This document provides information about analyzing Mycobacterium tuberculosis in the laboratory. It lists the equipment and reagents used, including liquid culture systems like MGIT and Bactec. It describes staining and microscopy techniques for visualizing the acid-fast bacilli, including Ziehl-Neelsen staining. The document outlines the procedures for culturing samples, identifying contaminants, and using rapid identification tests to detect M. tuberculosis antigens.
Mycobacterium tuberculosis is the bacterium that causes tuberculosis (TB). It is spread through the air when people who are sick with active pulmonary TB cough, sneeze or spit. Most infections are asymptomatic, but about 10% reactivate later in life, usually in the upper lobes of the lungs. Upon reactivation, TB bacilli can spread throughout the body and cause serious illness. Laboratory diagnosis of TB involves microscopic examination of samples for acid-fast bacilli or culturing samples on selective media like Lowenstein-Jensen medium.
This document discusses antifungal susceptibility testing. It provides background on the history of antifungal susceptibility testing and why it is needed. It describes different methods for testing including broth dilution and disk diffusion. It discusses various antifungal agents and their mechanisms of action. The document outlines the procedures for broth microdilution and macrodilution testing according to CLSI guidelines, including preparation of inoculum, drug solutions, reading results, and testing of filamentous fungi.
This document discusses antibiotic susceptibility testing for aerobic bacteria. It describes various antibiotic classes and provides examples of antibiotics within each class. It also discusses new antibiotics for treating multi-drug resistant gram-negative bacteria. The major mechanisms of antibiotic resistance are outlined. Finally, it summarizes methods for susceptibility testing and discusses antibiotic resistance in important bacteria such as MRSA, VRE, ESBL producers, and carbapenemase producers.
- Mycobacterium tuberculosis causes tuberculosis and infects around 1.7 million people annually, causing over 9 million new cases and 1.7 million deaths per year. An estimated 500,000 people are infected with multidrug resistant strains.
- Risk of infection and disease is highest among socioeconomically disadvantaged people with poor housing and nutrition. Tuberculosis is transmitted via respiratory aerosols from people with active, untreated tuberculosis.
- Laboratory diagnosis involves microscopy, culture, and molecular techniques using sputum, gastric washings, urine, tissues or other clinical samples. Staining methods like Ziehl-Neelsen identify acid-fast bacilli. Culturing is needed for species identification and drug
This document discusses ESBL (Extended Spectrum Beta Lactamases) which confer bacterial resistance to several classes of beta-lactam antibiotics. Early diagnosis of ESBL-producing pathogens is important to reduce mortality and morbidity. The document then describes several confirmatory tests for ESBL production, focusing on the double disk synergy test. This test involves placing disks containing beta-lactam antibiotics and amoxicillin-clavulanic acid on an inoculated agar plate. A positive result is indicated by a clear extension of the inhibition zone between the antibiotic and amoxicillin-clavulanic acid disks.
This document discusses methods for detecting Methicillin-Resistant Staphylococcus aureus (MRSA). MRSA is any strain of S. aureus that is resistant to beta-lactam antibiotics due to the mecA gene. Rapid detection of MRSA is important for optimal treatment and reducing costs. The document describes several screening methods, focusing on the oxacillin salt agar screening test which involves growing bacterial samples on agar containing oxacillin and 4% NaCl. Growth of more than one colony indicates oxacillin resistance and identifies the strain as MRSA.
This document discusses various laboratory methods for evaluating cellular immunity, including leukocyte phenotyping using flow cytometry to identify cell surface markers, delayed type hypersensitivity skin testing to assess memory T cell responses, lymphocyte activation assays to measure proliferation and cytokine production following stimulation, and assays of monocyte and neutrophil function like chemotaxis and phagocytosis. Flow cytometry is highlighted as the most widely used method for immunophenotyping and allows rapid identification and quantification of leukocyte subsets.
This document discusses beta lactamases and extended spectrum beta lactamases (ESBLs). It defines beta lactamases as enzymes produced by bacteria that confer resistance to beta lactam antibiotics by hydrolyzing the beta lactam ring. ESBLs are a type of beta lactamase that hydrolyze penicillins, cephalosporins, and aztreonam but are inhibited by beta lactamase inhibitors. The document outlines methods for detecting beta lactamases, such as the penicillin zone edge test, and ESBLs, including disk diffusion and broth microdilution tests. It also discusses
Mycobacterium tuberculosis is the bacterium that causes tuberculosis (TB). It is spread through the air when people who are sick with active pulmonary TB cough, sneeze or spit. Most infections are asymptomatic, but about 10% reactivate later in life, usually in the upper lobes of the lungs. Upon reactivation, TB bacilli can spread throughout the body and cause serious illness. Laboratory diagnosis of TB involves microscopic examination of samples for acid-fast bacilli or culturing samples on selective media like Lowenstein-Jensen medium.
This document discusses antifungal susceptibility testing. It provides background on the history of antifungal susceptibility testing and why it is needed. It describes different methods for testing including broth dilution and disk diffusion. It discusses various antifungal agents and their mechanisms of action. The document outlines the procedures for broth microdilution and macrodilution testing according to CLSI guidelines, including preparation of inoculum, drug solutions, reading results, and testing of filamentous fungi.
This document discusses antibiotic susceptibility testing for aerobic bacteria. It describes various antibiotic classes and provides examples of antibiotics within each class. It also discusses new antibiotics for treating multi-drug resistant gram-negative bacteria. The major mechanisms of antibiotic resistance are outlined. Finally, it summarizes methods for susceptibility testing and discusses antibiotic resistance in important bacteria such as MRSA, VRE, ESBL producers, and carbapenemase producers.
- Mycobacterium tuberculosis causes tuberculosis and infects around 1.7 million people annually, causing over 9 million new cases and 1.7 million deaths per year. An estimated 500,000 people are infected with multidrug resistant strains.
- Risk of infection and disease is highest among socioeconomically disadvantaged people with poor housing and nutrition. Tuberculosis is transmitted via respiratory aerosols from people with active, untreated tuberculosis.
- Laboratory diagnosis involves microscopy, culture, and molecular techniques using sputum, gastric washings, urine, tissues or other clinical samples. Staining methods like Ziehl-Neelsen identify acid-fast bacilli. Culturing is needed for species identification and drug
This document discusses ESBL (Extended Spectrum Beta Lactamases) which confer bacterial resistance to several classes of beta-lactam antibiotics. Early diagnosis of ESBL-producing pathogens is important to reduce mortality and morbidity. The document then describes several confirmatory tests for ESBL production, focusing on the double disk synergy test. This test involves placing disks containing beta-lactam antibiotics and amoxicillin-clavulanic acid on an inoculated agar plate. A positive result is indicated by a clear extension of the inhibition zone between the antibiotic and amoxicillin-clavulanic acid disks.
This document discusses methods for detecting Methicillin-Resistant Staphylococcus aureus (MRSA). MRSA is any strain of S. aureus that is resistant to beta-lactam antibiotics due to the mecA gene. Rapid detection of MRSA is important for optimal treatment and reducing costs. The document describes several screening methods, focusing on the oxacillin salt agar screening test which involves growing bacterial samples on agar containing oxacillin and 4% NaCl. Growth of more than one colony indicates oxacillin resistance and identifies the strain as MRSA.
This document discusses various laboratory methods for evaluating cellular immunity, including leukocyte phenotyping using flow cytometry to identify cell surface markers, delayed type hypersensitivity skin testing to assess memory T cell responses, lymphocyte activation assays to measure proliferation and cytokine production following stimulation, and assays of monocyte and neutrophil function like chemotaxis and phagocytosis. Flow cytometry is highlighted as the most widely used method for immunophenotyping and allows rapid identification and quantification of leukocyte subsets.
This document discusses beta lactamases and extended spectrum beta lactamases (ESBLs). It defines beta lactamases as enzymes produced by bacteria that confer resistance to beta lactam antibiotics by hydrolyzing the beta lactam ring. ESBLs are a type of beta lactamase that hydrolyze penicillins, cephalosporins, and aztreonam but are inhibited by beta lactamase inhibitors. The document outlines methods for detecting beta lactamases, such as the penicillin zone edge test, and ESBLs, including disk diffusion and broth microdilution tests. It also discusses
This document provides information about anti-fungal susceptibility testing. It discusses various fungi and the available anti-fungal drugs that act on different fungal targets like the cell wall, cell membrane, microtubules, RNA/DNA, and protein synthesis. It covers different testing methods like macrodilution, microdilution, and disk diffusion. It provides details on test medium, inoculum preparation, drug dilutions, and incubation conditions. It also discusses interpretive criteria, quality control strains and ranges, emerging resistance, and the need for susceptibility testing.
Antibiotic Sensitivity Testing 2020 Update Margie Morgan
This document discusses antibiotic sensitivity testing and provides information on:
1. Common antibiotic classes and mechanisms of resistance.
2. Methods for antibiotic sensitivity testing including disk diffusion, E test, and broth dilution.
3. Important resistant bacteria like MRSA, VRE, ESBLs, CREs, and guidelines for detecting them.
4. Interpreting results and quality control for antibiotic sensitivity testing.
This document discusses bacteriocin typing for epidemiological investigations. It defines bacteriocins as bactericidal proteins produced by bacteria that kill closely related bacterial strains. Bacteriocin typing involves determining the bacteriocin production patterns of strains against indicator strains or testing strains for susceptibility to different bacteriocins. This allows differentiation of bacterial isolates and investigation of outbreaks. Specific examples discussed are colicin typing of E. coli and pyocin typing of P. aeruginosa. The document outlines the methods for these typing techniques.
The document discusses the immune system and different types of immunity. It describes innate immunity, which provides non-specific protection, and adaptive immunity, which provides antigen-specific protection through B cells and T cells. It then focuses on the differences between active and passive immunity. Active immunity develops through exposure to an antigen and results in immunological memory, while passive immunity involves the transfer of ready-made antibodies without memory. Active immunity can be acquired naturally through infection or artificially through vaccination.
Extended spectrum β-lactamases (ESBLs) pose challenges for detection and treatment. ESBLs hydrolyze many penicillins and cephalosporins but are inhibited by β-lactamase inhibitors. Delayed or incorrect detection of ESBL producers can lead to inappropriate cephalosporin treatment and worse outcomes. Laboratory detection of ESBLs is complex, requiring screening methods like combination disks or double disk synergy tests followed by confirmatory tests. Genotypic methods can also detect ESBL genes. Accurate detection is important for infection control and antibiotic stewardship given ESBL producers' resistance and transmission risks.
Laboratory diagnosis of tuberculosis pract.deepak deshkar
This document summarizes the laboratory diagnosis of tuberculosis. It describes how specimens are collected from pulmonary and extra-pulmonary sites. The specimens then undergo decontamination, concentration, and acid-fast staining for direct microscopic examination. Culture methods including solid and liquid media as well as automated systems are discussed. Biochemical tests and animal inoculation are used to identify Mycobacterium tuberculosis. Sensitivity testing evaluates resistance to anti-tubercular drugs using phenotypic and molecular methods. Molecular diagnostic techniques like PCR are also employed.
Immunochromatographic assays, also known as lateral flow strip tests, allow for the rapid detection of antigens or antibodies in a sample within 15 minutes. The test works by utilizing two types of antibodies - one immobilized on the test strip and one labeled with a detectable marker like colloidal gold. When a sample is applied, it migrates up the strip via capillary action, allowing any antigens/antibodies in the sample to bind to the labeled antibodies and form complexes. These complexes are then captured by the immobilized antibodies, producing a visible test line that confirms the presence of the target antigen or antibody. Lateral flow tests are commercially available, easy to use, and provide results quickly with no specialized equipment,
Antimicrobial susceptibility testing (AST) determines the resistance of microorganisms to antimicrobial agents. There are several methods for AST including disk diffusion, dilution methods, and E tests. Guidelines for AST are provided by CLSI and EUCAST. Mueller Hinton agar is the recommended medium for testing and inoculum preparation follows the 0.5 McFarland standard. Quality control using standard reference strains is important to ensure accurate and reproducible AST results.
Enterococci are Gram-positive cocci that are natural inhabitants of the gastrointestinal tract. They have become important nosocomial pathogens due to their intrinsic and acquired antibiotic resistance. This study found that Enterococcus faecalis was the most common species isolated from clinical specimens in two Saudi hospitals. Many isolates showed resistance to tetracycline, ciprofloxacin, and chloramphenicol. Vancomycin resistance was observed in 3.9% of isolates, with the VanA phenotype being most common. Pulsed-field gel electrophoresis identified identical clones of E. faecalis isolated from different hospital wards, suggesting intra-hospital transmission. The high resistance rates indicate a need for improved infection control and antibiotic steward
The TSI test is used to determine carbohydrate fermentation and hydrogen sulfide production in bacteria. It contains glucose, sucrose, and lactose sugars, along with peptones and phenol red pH indicator. Carbohydrate fermentation produces acid, changing the color from red to yellow, while peptone metabolism makes it more alkaline. Hydrogen sulfide production is shown by black precipitate. Results are interpreted based on color changes in the slant and butt portions, indicating which sugars are fermented and if H2S is produced.
This document discusses AmpC β-lactamases, which confer resistance to many β-lactam antibiotics like penicillins, cephalosporins, and monobactams. AmpC β-lactamases can be chromosomally or plasmid encoded. Several phenotypic and genotypic methods are described for detecting AmpC producers. Treatment options for infections involving AmpC producers include carbapenems, cephamycins, quinolones, aminoglycosides, and fosfomycin. Standard and transmission-based precautions are important for infection control.
Neisseria gonorrhoeae and N. meningitidis are pathogenic Neisseria species. N. gonorrhoeae causes gonorrhea, transmitted sexually or from mother to child. It infects the urethra, cervix, and other sites. Without treatment, it can spread and cause complications like pelvic inflammatory disease. N. meningitidis causes meningitis, transmitted through airborne droplets. It infects the nasopharynx and can spread to the blood and CNS. Laboratory diagnosis involves gram stain, culture on selective media, and rapid carbohydrate utilization tests. Gonorrhea pathology in females includes salpingitis, tubo-ovarian abscess,
The document discusses various methods for creating anaerobic conditions necessary for culturing anaerobic bacteria. It describes how oxygen is toxic to anaerobes and the importance of rapid specimen collection and transport to the laboratory with minimal oxygen exposure. Common methods for establishing anaerobic environments include incorporating chemical reducing agents into media, displacing oxygen with inert gases, and using anaerobic jars, chambers, or bags containing catalysts that convert oxygen to water. Proper selection and handling of clinical specimens, use of appropriate media, and correct incubation and processing are essential for successful anaerobic culture.
This document lists five types of Escherichia coli that can cause diarrhea: enterotoxigenic E. coli, enteropathogenic E. coli, enteroinvasive E. coli, enterohemorrhagic E. coli, and enteroaggregative E. coli. It then describes the laboratory diagnosis of E. coli, including collecting fecal or other samples depending on the site of infection, examining samples under microscopy and culturing them on different agar plates, conducting biochemical tests, and performing antibiotic sensitivity testing using disc diffusion. The goal is to identify the specific type of diarrheagenic E. coli.
Concise discussion on essential clinical and microbiological aspects of Candia, Pneumocystis and Aspergillus infections in HIV and other immunocompromised patients.
Bacillus anthracis is the bacterium that causes anthrax. It is an aerobic, gram-positive, spore-forming bacillus. Anthrax spores can survive in soil for years and infect animals that ingest the spores. Humans can become infected through contact with infected animals or inhaling anthrax spores. There are three main types of anthrax in humans - cutaneous, pulmonary, and intestinal. Cutaneous anthrax causes skin lesions, pulmonary anthrax causes infection in the lungs after inhaling spores, and intestinal anthrax results from consuming infected meat. Laboratory diagnosis involves examining samples under microscopy, culturing on selective media, and animal inoculation. Anthrax is treated with antibiotics
Serological tests play an important role in the diagnosis of invasive fungal infections. Key serological tests discussed in the document include agglutination, immunodiffusion, complement fixation, enzyme-linked immunosorbent assay (ELISA), and lateral flow assays. ELISA tests have advantages like rapidity and are commonly used to detect fungal antigens or antibodies associated with diseases like cryptococcosis, aspergillosis, histoplasmosis, and candidiasis. The galactomannan ELISA assay detects a polysaccharide antigen released by Aspergillus and is useful for diagnosing invasive aspergillosis.
The document discusses the Neisseriae bacteria. It notes that Neisseria gonorrhoeae and Neisseria meningitidis are pathogenic to humans and typically found inside or associated with polymorphonuclear cells. N. gonorrhoeae causes gonorrhea infections of the genital tract, while N. meningitidis typically infects the upper respiratory tract and causes meningitis. The document provides details on the morphology, identification, culture characteristics and diseases caused by these two pathogenic Neisseriae species.
A picornavirus is a virus belonging to the family Picornaviridae, a family of viruses in the order Picornavirales. Vertebrates, including humans, serve as natural hosts. Picornaviruses are nonenveloped viruses that represent a large family of small, cytoplasmic, plus-strand RNA viruses with a 30-nm icosahedral capsid.
1. The document discusses the laboratory diagnosis of Salmonella, which causes enteric fever and gastroenteritis in humans. Blood culture is the best specimen for diagnosis in the first week, while stool and urine cultures are optimal in later weeks.
2. Serological tests like the Widal test detect antibodies against Salmonella, while rapid tests like Typhidot and IDL Tubex detect IgM antibodies.
3. Isolation of Salmonella from stool requires plating on selective media followed by biochemical tests and serotyping using slide agglutination to identify the serovar. Antimicrobial susceptibility testing helps guide treatment.
The document discusses laboratory diagnosis of bacterial infections. It describes how automated systems can identify bacteria faster and more accurately than conventional methods. Several automated systems are highlighted, including BacT/ALERT and VITEK, which continuously monitor blood culture bottles for microbial growth. MALDI-TOF enables rapid bacterial identification by examining ribosomal protein patterns. VITEK 2 and other automated systems can identify bacteria and perform antimicrobial susceptibility testing in a single system within a day. Overall, the document outlines the benefits of automation for improving the efficiency and accuracy of bacterial diagnostics.
Increasing importance of clinical microbiology inspired me to work on the clinical diagnosis and microbiology. The presentation will definitely help you to understand the world of microbiology better.
https://www.linkedin.com/in/shradheya-r-r-gupta-54492984/
This document provides information about anti-fungal susceptibility testing. It discusses various fungi and the available anti-fungal drugs that act on different fungal targets like the cell wall, cell membrane, microtubules, RNA/DNA, and protein synthesis. It covers different testing methods like macrodilution, microdilution, and disk diffusion. It provides details on test medium, inoculum preparation, drug dilutions, and incubation conditions. It also discusses interpretive criteria, quality control strains and ranges, emerging resistance, and the need for susceptibility testing.
Antibiotic Sensitivity Testing 2020 Update Margie Morgan
This document discusses antibiotic sensitivity testing and provides information on:
1. Common antibiotic classes and mechanisms of resistance.
2. Methods for antibiotic sensitivity testing including disk diffusion, E test, and broth dilution.
3. Important resistant bacteria like MRSA, VRE, ESBLs, CREs, and guidelines for detecting them.
4. Interpreting results and quality control for antibiotic sensitivity testing.
This document discusses bacteriocin typing for epidemiological investigations. It defines bacteriocins as bactericidal proteins produced by bacteria that kill closely related bacterial strains. Bacteriocin typing involves determining the bacteriocin production patterns of strains against indicator strains or testing strains for susceptibility to different bacteriocins. This allows differentiation of bacterial isolates and investigation of outbreaks. Specific examples discussed are colicin typing of E. coli and pyocin typing of P. aeruginosa. The document outlines the methods for these typing techniques.
The document discusses the immune system and different types of immunity. It describes innate immunity, which provides non-specific protection, and adaptive immunity, which provides antigen-specific protection through B cells and T cells. It then focuses on the differences between active and passive immunity. Active immunity develops through exposure to an antigen and results in immunological memory, while passive immunity involves the transfer of ready-made antibodies without memory. Active immunity can be acquired naturally through infection or artificially through vaccination.
Extended spectrum β-lactamases (ESBLs) pose challenges for detection and treatment. ESBLs hydrolyze many penicillins and cephalosporins but are inhibited by β-lactamase inhibitors. Delayed or incorrect detection of ESBL producers can lead to inappropriate cephalosporin treatment and worse outcomes. Laboratory detection of ESBLs is complex, requiring screening methods like combination disks or double disk synergy tests followed by confirmatory tests. Genotypic methods can also detect ESBL genes. Accurate detection is important for infection control and antibiotic stewardship given ESBL producers' resistance and transmission risks.
Laboratory diagnosis of tuberculosis pract.deepak deshkar
This document summarizes the laboratory diagnosis of tuberculosis. It describes how specimens are collected from pulmonary and extra-pulmonary sites. The specimens then undergo decontamination, concentration, and acid-fast staining for direct microscopic examination. Culture methods including solid and liquid media as well as automated systems are discussed. Biochemical tests and animal inoculation are used to identify Mycobacterium tuberculosis. Sensitivity testing evaluates resistance to anti-tubercular drugs using phenotypic and molecular methods. Molecular diagnostic techniques like PCR are also employed.
Immunochromatographic assays, also known as lateral flow strip tests, allow for the rapid detection of antigens or antibodies in a sample within 15 minutes. The test works by utilizing two types of antibodies - one immobilized on the test strip and one labeled with a detectable marker like colloidal gold. When a sample is applied, it migrates up the strip via capillary action, allowing any antigens/antibodies in the sample to bind to the labeled antibodies and form complexes. These complexes are then captured by the immobilized antibodies, producing a visible test line that confirms the presence of the target antigen or antibody. Lateral flow tests are commercially available, easy to use, and provide results quickly with no specialized equipment,
Antimicrobial susceptibility testing (AST) determines the resistance of microorganisms to antimicrobial agents. There are several methods for AST including disk diffusion, dilution methods, and E tests. Guidelines for AST are provided by CLSI and EUCAST. Mueller Hinton agar is the recommended medium for testing and inoculum preparation follows the 0.5 McFarland standard. Quality control using standard reference strains is important to ensure accurate and reproducible AST results.
Enterococci are Gram-positive cocci that are natural inhabitants of the gastrointestinal tract. They have become important nosocomial pathogens due to their intrinsic and acquired antibiotic resistance. This study found that Enterococcus faecalis was the most common species isolated from clinical specimens in two Saudi hospitals. Many isolates showed resistance to tetracycline, ciprofloxacin, and chloramphenicol. Vancomycin resistance was observed in 3.9% of isolates, with the VanA phenotype being most common. Pulsed-field gel electrophoresis identified identical clones of E. faecalis isolated from different hospital wards, suggesting intra-hospital transmission. The high resistance rates indicate a need for improved infection control and antibiotic steward
The TSI test is used to determine carbohydrate fermentation and hydrogen sulfide production in bacteria. It contains glucose, sucrose, and lactose sugars, along with peptones and phenol red pH indicator. Carbohydrate fermentation produces acid, changing the color from red to yellow, while peptone metabolism makes it more alkaline. Hydrogen sulfide production is shown by black precipitate. Results are interpreted based on color changes in the slant and butt portions, indicating which sugars are fermented and if H2S is produced.
This document discusses AmpC β-lactamases, which confer resistance to many β-lactam antibiotics like penicillins, cephalosporins, and monobactams. AmpC β-lactamases can be chromosomally or plasmid encoded. Several phenotypic and genotypic methods are described for detecting AmpC producers. Treatment options for infections involving AmpC producers include carbapenems, cephamycins, quinolones, aminoglycosides, and fosfomycin. Standard and transmission-based precautions are important for infection control.
Neisseria gonorrhoeae and N. meningitidis are pathogenic Neisseria species. N. gonorrhoeae causes gonorrhea, transmitted sexually or from mother to child. It infects the urethra, cervix, and other sites. Without treatment, it can spread and cause complications like pelvic inflammatory disease. N. meningitidis causes meningitis, transmitted through airborne droplets. It infects the nasopharynx and can spread to the blood and CNS. Laboratory diagnosis involves gram stain, culture on selective media, and rapid carbohydrate utilization tests. Gonorrhea pathology in females includes salpingitis, tubo-ovarian abscess,
The document discusses various methods for creating anaerobic conditions necessary for culturing anaerobic bacteria. It describes how oxygen is toxic to anaerobes and the importance of rapid specimen collection and transport to the laboratory with minimal oxygen exposure. Common methods for establishing anaerobic environments include incorporating chemical reducing agents into media, displacing oxygen with inert gases, and using anaerobic jars, chambers, or bags containing catalysts that convert oxygen to water. Proper selection and handling of clinical specimens, use of appropriate media, and correct incubation and processing are essential for successful anaerobic culture.
This document lists five types of Escherichia coli that can cause diarrhea: enterotoxigenic E. coli, enteropathogenic E. coli, enteroinvasive E. coli, enterohemorrhagic E. coli, and enteroaggregative E. coli. It then describes the laboratory diagnosis of E. coli, including collecting fecal or other samples depending on the site of infection, examining samples under microscopy and culturing them on different agar plates, conducting biochemical tests, and performing antibiotic sensitivity testing using disc diffusion. The goal is to identify the specific type of diarrheagenic E. coli.
Concise discussion on essential clinical and microbiological aspects of Candia, Pneumocystis and Aspergillus infections in HIV and other immunocompromised patients.
Bacillus anthracis is the bacterium that causes anthrax. It is an aerobic, gram-positive, spore-forming bacillus. Anthrax spores can survive in soil for years and infect animals that ingest the spores. Humans can become infected through contact with infected animals or inhaling anthrax spores. There are three main types of anthrax in humans - cutaneous, pulmonary, and intestinal. Cutaneous anthrax causes skin lesions, pulmonary anthrax causes infection in the lungs after inhaling spores, and intestinal anthrax results from consuming infected meat. Laboratory diagnosis involves examining samples under microscopy, culturing on selective media, and animal inoculation. Anthrax is treated with antibiotics
Serological tests play an important role in the diagnosis of invasive fungal infections. Key serological tests discussed in the document include agglutination, immunodiffusion, complement fixation, enzyme-linked immunosorbent assay (ELISA), and lateral flow assays. ELISA tests have advantages like rapidity and are commonly used to detect fungal antigens or antibodies associated with diseases like cryptococcosis, aspergillosis, histoplasmosis, and candidiasis. The galactomannan ELISA assay detects a polysaccharide antigen released by Aspergillus and is useful for diagnosing invasive aspergillosis.
The document discusses the Neisseriae bacteria. It notes that Neisseria gonorrhoeae and Neisseria meningitidis are pathogenic to humans and typically found inside or associated with polymorphonuclear cells. N. gonorrhoeae causes gonorrhea infections of the genital tract, while N. meningitidis typically infects the upper respiratory tract and causes meningitis. The document provides details on the morphology, identification, culture characteristics and diseases caused by these two pathogenic Neisseriae species.
A picornavirus is a virus belonging to the family Picornaviridae, a family of viruses in the order Picornavirales. Vertebrates, including humans, serve as natural hosts. Picornaviruses are nonenveloped viruses that represent a large family of small, cytoplasmic, plus-strand RNA viruses with a 30-nm icosahedral capsid.
1. The document discusses the laboratory diagnosis of Salmonella, which causes enteric fever and gastroenteritis in humans. Blood culture is the best specimen for diagnosis in the first week, while stool and urine cultures are optimal in later weeks.
2. Serological tests like the Widal test detect antibodies against Salmonella, while rapid tests like Typhidot and IDL Tubex detect IgM antibodies.
3. Isolation of Salmonella from stool requires plating on selective media followed by biochemical tests and serotyping using slide agglutination to identify the serovar. Antimicrobial susceptibility testing helps guide treatment.
The document discusses laboratory diagnosis of bacterial infections. It describes how automated systems can identify bacteria faster and more accurately than conventional methods. Several automated systems are highlighted, including BacT/ALERT and VITEK, which continuously monitor blood culture bottles for microbial growth. MALDI-TOF enables rapid bacterial identification by examining ribosomal protein patterns. VITEK 2 and other automated systems can identify bacteria and perform antimicrobial susceptibility testing in a single system within a day. Overall, the document outlines the benefits of automation for improving the efficiency and accuracy of bacterial diagnostics.
Increasing importance of clinical microbiology inspired me to work on the clinical diagnosis and microbiology. The presentation will definitely help you to understand the world of microbiology better.
https://www.linkedin.com/in/shradheya-r-r-gupta-54492984/
Flexible chip for long-term antimicrobial resistance experimentsIowa State University
By creating a low-cost, three-dimensional microfluidic platform, we have improved our ability to study bacterial cells at the single cell level. This technology allows for prolonged culturing of bacteria in a controlled environment, as well as high resolution observation and imaging of cells. We have used this platform to examine morphological changes in Escherichia coli exposed to ampicillin and to quantify the minimum inhibitory concentration of the antibiotic. Additionally, we demonstrated the potential for precise gene regulation using CRISPR interference (CRISPRi) in a concentration gradient. Ultimately, this engineering tool should be useful for uncovering new genetic factors that influence antibiotic susceptibility and evaluating the long-term effectiveness of antibiotics.
Adhesive Tape Microfluidics with an Autofocusing Module That Incorporates CRISPR Interference: Applications to Long-Term Bacterial Antibiotic Studies, Taejoon Kong, Nicholas Backes, Upender Kalwa, Christopher Legner, Gregory J. Phillips, and Santosh Pandey, ACS Sensors 2019 4 (10), 2638-2645
https://doi.org/10.1021/acssensors.9b01031
https://pubs.acs.org/doi/full/10.1021/acssensors.9b01031
This project report summarizes the process of blood culture testing. The purpose is to detect bloodborne microorganisms in patients with sepsis. Blood samples are inoculated into culture bottles and incubated for 5 days. The system monitors for increases in fluorescence that indicate growth. Positive bottles are subcultured onto agar plates and identified using staining techniques like Gram stain and Vitek 2 compact system. Identification of bacteria and reporting of antibiotic sensitivities helps in diagnosis and treatment of septic patients.
What You May Have Missed at AACC 2018 White Paper - Kalorama InformationBruce Carlson
Each year the American Association for Clinical Chemistry draws tens of thousands of lab professionals and in vitro diagnostic vendors to one place. Kalorama Information was there and noted major developments at the meeting in this White Paper. Major themes of scientific sessions, new products from lab and IVD vendors are included.
Ringbio Microbial Count Plate for microbiology fast enumeration in food and beverage samples. These products are ISO and AOAC methods compliant. They have the advantage of easy operation, low cost and simple material requirement.
- Pressure BioSciences is initiating coverage of Pressure BioSciences (PBIO) stock with a Speculative Buy rating and $0.70 price target, almost triple the current market valuation.
- PBIO focuses on developing and selling proprietary sample preparation instruments and consumables using Pressure Cycling Technology (PCT), which uses high pressure to control biomolecular interactions.
- The analyst believes PBIO is positioned for accelerating sales growth as it expands its product portfolio and develops new high-throughput capabilities that could open important new markets.
As presented at the CRS Annual Meeting & Exposition 2018 by Steve Thomas, Oliver Batley and Mara Tavares (Cambridge Consultants) and Justyna Klimczac and Elżbieta Górecka (Proteon Pharmaceuticals)
Producing Biologics with C1. The cell expression system of the futureDyadic
The C1 expression system has the potential to change the way in which both animal health and human biotech and pharmaceutical companies bring their biologic vaccines and drugs to market faster, in greater volumes, at lower cost, and with newer beneficial properties, and most importantly save lives.
- Biologics manufacturing is growing rapidly due to increased biologics sales and pipeline products. Biologics are projected to exceed $390 billion by 2020 and nearly reach parity with small molecules.
- Many CMOs are expanding biologics manufacturing capacity through new facilities and production trains featuring single-use technologies and larger bioreactors up to 2000L. Locations include the US, Europe, and Asia.
- Emerging biologics modalities like cell and gene therapies are driving additional manufacturing capacity investments in viral vector production and cell therapy services.
En la siguiente podemos ver como se integran productos terminados industriales sobre procesos de diagnóstico y tratamientos estandarizados, en este caso estamos hablando de bioreactores industriales y procesos de criogenización y liofilización, que son el stage 1 de un proceso industrial de biotecnología. Por que existen estas compañías certificadoras para que sociedades AEMED como la nuestra tengan una guía sobre la cual basar sus avances, hay muchas organizaciones privadas, públicas, y gubernamentales que se dedican a esto, elegí ATCC por que da formación específica gratuita y son asequibles y pueden colaborar en el futuro si AEMED esta a la altura con un proyecto propio.
ATCC y otros reguladores internacionales de bioderivados. Minis support vitek...Dr. Manuel Concepción
En la siguiente podemos ver como se integran productos terminados industriales sobre procesos de diagnóstico y tratamientos estandarizados, en este caso estamos hablando de bioreactores industriales y procesos de criogenización y liofilización, que son el stage 1 de un proceso industrial de biotecnología. Por que existen estas compañías certificadoras para que sociedades AEMED como la nuestra tengan una guía sobre la cual basar sus avances, hay muchas organizaciones privadas, públicas, y gubernamentales que se dedican a esto, elegí ATCC por que da formación específica gratuita y son asequibles y pueden colaborar en el futuro si AEMED esta a la altura con un proyecto propio.
1) NACGRAB strengthened its capacity to produce high quality pre-basic yam seedlings for producers through its collaboration with IITA on the YIIFSWA project.
2) In 2017, NACGRAB established a temporary immersion bioreactor system and multiplied existing yam varieties, producing over 3,000 plantlets.
3) NACGRAB supplied over 1,800 disease-free plantlets of three promoted varieties to NRCRI and over 1,000 plantlets to IITA to meet seed demand.
Detection of staphylococcus aureus in various clinical samples and water samp...IRJET Journal
The document describes a study that detected the presence of Staphylococcus aureus bacteria in various clinical samples and water samples. S. aureus can cause infections in humans and contaminate water sources. The study aimed to identify suitable antibiotics and disinfectants for treating S. aureus. Clinical and water samples were collected and cultured. Tests identified S. aureus and whether strains were methicillin-resistant (MRSA) or sensitive (MSSA). Remedial measures trialed on water samples included bleaching powder, sodium hypochlorite, hydrogen peroxide, turmeric, and ginger to disinfect S. aureus bacteria. The study helps determine effective treatment and prevention of S. aureus contamination.
The document describes the Lightning-Link Biotin Conjugation Kit, which allows for the rapid conjugation of biotin to antibodies or other biomolecules. The kit contains a lyophilized mixture that activates upon the addition of the biomolecule to be labeled. This results in the directional coupling of biotin to the biomolecule in a gentle process at near-neutral pH. The conjugation can be performed on quantities ranging from micrograms to milligrams of the biomolecule. No separation steps are required after the conjugation is complete. Common buffer conditions that are compatible with the kit are listed.
Building on the sell-out success of the launch event, SMi Group is delighted to announce the return of 3D Cell Culture, taking place on 21st and 22nd of February 2018, in London UK.
3D Cell Culture is rapidly growing with incredible potential for industrial application and a widespread reach that can be seen across many different fields, such as 3D bioprinting and microfluidics.
The 2nd annual conference will explore these overlapping areas and will combine pioneering breakthroughs with scientific research to strengthen your commercial success. Join us for exclusive insight into key topics such as disease models, organoids, organ-on-a-chip technologies, Ipsc advances and CRISPR technology. Notable speakers on the agenda for 2018 will include experts from Aurelia Bioscience, ReInnervate Ltd, Cell and Gene Therapy Catapult, University College London, Novartis Institutes for Biomedical Research, Kugelmeiers, GSK, AstraZeneca, Roche and more!
A tissue engineering company is developing SilkByPass, the first vascular graft made of fibroin silk, to help patients regenerate new blood vessels. SilkByPass uses a combination of nano-fibrous electrospun silk fibroin and micro-fibrous silk fabrics to stimulate fast, natural human tissue regeneration without cells, drugs, or growth factors. Preclinical studies show SilkByPass integrates with the body and regenerates functional vascular tissue within 7 days with no immune rejection. The company aims to address the $4 billion market for tissue engineered vascular grafts.
Case studies of the impacts of biotechnologies and the missing biotechnologie...ExternalEvents
This document discusses case studies of biotechnologies used in aquaculture and identifies missing biotechnologies. It presents two case studies: 1) Thailand's use of HPLC to test for antibiotic residues in shrimp to meet export standards, and 2) adopting PCR screening and best practices to address disease in small-scale Thai shrimp farms. However, it notes that aquaculture lacks biotechnologies to adapt genetically to diverse local systems and ensure future adaptability. Specific missing biotechnologies identified are techniques for exchanging germplasm without disease risk, identifying diverse breeds, controlling inbreeding without pedigree records, and science-focused breed associations like those for other domesticated animals. The document calls for developing such biotechnologies to better
Astek Diagnostics is developing the Jiddu system, a rapid diagnostic test that can confirm bacterial infections and assess antibiotic sensitivity in urine, CSF, effluent, and blood samples in 1 hour. The company has completed over 400 urine-based tests with high accuracy. Its vision is for Jiddu to help address the growing problem of antibiotic resistance by providing fast, accurate, and easy-to-use diagnostics to guide treatment decisions. Astek is currently validating Jiddu for urine samples and has proof-of-concept data for other sample types. It expects FDA approval in 2025 and plans commercialization through distribution partners while retaining a focus on research and expanding the platform.
This document describes Antibiotic Medium No. 2, a standard agar medium used to prepare the base layer in microbiological assays of antibiotics. The medium contains peptone, beef extract, yeast extract, and agar. It supports the growth of Staphylococcus aureus, Micrococcus luteus, and Staphylococcus epidermidis and can be used to test antibiotics like methicillin, dicloxacillin, bacitracin, and novobiocin via measurement of inhibition zones. The document provides instructions for preparing the medium and using the cylinder method assay technique.
Similar to Mycobacteria (tuberculosis) Laboratory Diagnosis (20)
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
share - Lions, tigers, AI and health misinformation, oh my!.pptxTina Purnat
• Pitfalls and pivots needed to use AI effectively in public health
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• Building trust with communities online and offline
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ABDOMINAL TRAUMA in pediatrics part one.drhasanrajab
Abdominal trauma in pediatrics refers to injuries or damage to the abdominal organs in children. It can occur due to various causes such as falls, motor vehicle accidents, sports-related injuries, and physical abuse. Children are more vulnerable to abdominal trauma due to their unique anatomical and physiological characteristics. Signs and symptoms include abdominal pain, tenderness, distension, vomiting, and signs of shock. Diagnosis involves physical examination, imaging studies, and laboratory tests. Management depends on the severity and may involve conservative treatment or surgical intervention. Prevention is crucial in reducing the incidence of abdominal trauma in children.
Does Over-Masturbation Contribute to Chronic Prostatitis.pptxwalterHu5
In some case, your chronic prostatitis may be related to over-masturbation. Generally, natural medicine Diuretic and Anti-inflammatory Pill can help mee get a cure.
Local Advanced Lung Cancer: Artificial Intelligence, Synergetics, Complex Sys...Oleg Kshivets
Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
1. MYCOBACTERIUM (Tuberculosis)
UNLOADED POSITVES AND
NEGATIVES
Isaac Okello Opio
Research Assistant
Mycobacteriology lab
College of Health Sciences-Mulago
isaacokelloopio@gmail.com
0778336598 / 0700662434
3. What is TB?
The scientific name for the TB microbe is Mycobacterium tuberculosis or
M. tb
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4. What is TB?
Beneath a microscope, it has a
long rod-like shape or ‘bacillus’
The thick waxy cell wall allows the
germ to spread through the air in
water droplets
TB bacilli stained bright red
using the Ziehl-Neelson stain
(image copyright Dennis Kunkel
Microscopy, Inc.)
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9. Koch R, 1884 Wikipedia, 2008
Cole ST, et al. Nature 1998;393:537-44
Morphology
Metabolism
Genome How does it look?
How does it reproduce?
What makes it function?
LAB ANALYSIS
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13. The BD BACTEC™ MGIT™ 960 Instrument is a
fully automated system for the rapid detection
of mycobacteria in clinical specimens other than
blood.
The BD BACTEC™ MGIT™ 960 is also used for
the antimicrobial susceptibility testing of
mycobacteria, including SIRE and PZA
susceptibility testing.
The instrument has a maximum capacity of 960
BBL™ MGIT™ tubes (7 ml), or with a 42-day
detection protocol, approximately 8000
specimens per year.
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15. PRINCIPLE OF ANALYSIS OF BACTEC 960
System contains
-liquid culture medium MGIT,
-growth supplement (essential substances for growth)
- and antibiotic mixture PANTA (mixture of antimicrobial agents used to
suppress the growth of contaminating bacteria)
Florescent compound is embedded in silicone on the bottom of each
MGIT broth tube. Respiring organisms consume oxygen and allow the
fluorescence.
Machine monitors the tube for increasing fluorescence, basis for positivity
or negativity. I.e. culture contains viable organisms
NB: Culture tubes that remain negative for 42 days are removed as
machine negative.
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17. Preliminary identification of
M. tuberculosis from liquid cultures
Flocculation: granular,
non-homogeneous
suspension
ZN: serpentine cords of
varying length or district
linear clumping
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18. Contamination – liquid media
Homogeneous turbidity
Perform a ZN staining: non-
acid-fast bacteria
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11/12/2020Prepared by: ISAAC (Research Assistant) 0778336598 / 0700662434 Email: isaacokelloopio@gmail.com
19. Contaminants
Mycobacteria other than
tuberculosis (MOTT/NTM)
fast- or slow-growers
acid-fast bacilli
microscopy: usually not
arranged in cords
Fungi
usually slow-growers
non-acid fast
microscopy: hyphae are
thicker than mycobacteria
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Growth rate and microscopy aspects are considered.
11/12/2020Prepared by: ISAAC (Research Assistant) 0778336598 / 0700662434 Email: isaacokelloopio@gmail.com
20. Contaminants
Bacteria
Fast growers, usually non-
acid fast, with the exception
of Rhodococcus equi
(coccus-shaped) and of
Nocardia spp (partially acid-
fast and do not form cords)
Yeasts
non-acid fast round in shape
and bigger than
mycobacteria)
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Growth rate and microscopy aspects are considered.
11/12/2020Prepared by: ISAAC (Research Assistant) 0778336598 / 0700662434 Email: isaacokelloopio@gmail.com
22. Quality control of MGIT
Examine MGIT tube for damage, discoloration, and /or contamination
prior to use, and record findings.
Keep the MGIT tube closed until ready for specimen or PANTA/growth
media addition.
Check storage conditions and expiration dates of lyophilized PANTA
(maintain refrigerator at 2-8 degrees Celsius)
Before using new lot of MGIT tubes, it should be tested with three
species of Mycobacteria: M.fortuitum, M.kansasii, M.tuberculosis
(H37Rv), which are thawed and subcultured two weeks prior to lot
testing using 7H10
The expected results depends on the dilution factor Vs the machine
TTDs
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23. DEMONSTARTION OF LIQUID MEDIA
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26. Bactec 9120
For rapid detection of Mycobacteria
in the clinical blood samples using
bactec 9120 automated culture
system.
Samples are collcted from patients
and inoculated into BACTEC
containing a liquid broth
and instrument automatically
detects growth of Mycobacteria in
the tubes.
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27. Principle for Bactec 9120
Sample to be tested is inoculated into the vial which is entered into the
BACTEC instrument for incubation and periodic reading.
It is constantly agitated and incubated at 35 C
Each vial contains a sensor which response with the concentration of
C02 produced by metabolism of microorganisms or the consumption of
oxygen needed for the growth of microorganisms.
The sensor is monitored by the instrument every 10 minutes for an
increase in its fluorescence
This proportional to the increase in C02 or decrease in 02 amount
present in the vial.
A positive reading indicates the presumptive presence of viable
microorganism in the vial.
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28. Contains 7H9 broth
This contains inorganic salts which help the growth of mycobacteria
- Citric acid from sodium citrate helps in retaining inorganic cations
in solution.
- Glycerol supplies carbon and energy
- Middlebrook OADC supplements
Oleic acid; essential for mycobacteria metabolism
Dextrose; energy source
Catalase; neutralizes toxic peroxides
Albumin; protects bacilli from toxic agents
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29. MICROSCOPY Slide preparation
Properly labeling a slide
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35. Acid-Fast (Kinyoun) Stain of Mycobacterium
NOTE: cord growth (serpentine
arrangement) of virulent strains
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36. QC FOR ZN
Prepare batches of control slides
Test new lot of stains prepared
During staining, include control slides
During examination, begin with control slides and record on QC from for ZN
worksheet
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38. Principles in two types of microscopy
Staining
Bright-field
microscopy
Flurorescence
microscopy
Primary stain
(stains everything) Fuchsin Auramine
Decolorant
(destains everything
except mycobacteria)
Hydrochloric acid
or
Sulfuric acid
Hydrochloric acid
Counter-stain
(stains everything
except color-saturated
mycobacteria)
Methylene blue
Methylene blue
or
Other 11/12/2020
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39. The “Ziehl-Neelsen” staining technique: an
experimental path to optimization, ready and all set
since 1882
Contributor Contribution
Robert Koch Primary stain: methylene blue, alkaline potassium
hydrate as mordant, vesuvium as both decolorant and
counterstain
Paul Ehrlich Fuchsin as primary stain, alkaline alinine as mordant,
nitric acid as decolorant, and proposal of a blue
counterstain
Franz Ziehl Replace mordant with phenol
Friedrich
Neelsen
Combine the best of all: primary and counterstain from
Ehrlich, mordant from Ziehl, and replacing decolorant
with sulphuric acid
Bishop P J, Neumann G. The history of the Ziehl-Neelsen stain. Tubercle 1970;51:196-206
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40. Lower sensitivity of Ziehl-Neelsen or
lower specificity of fluorescence microscopy?
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41. Rapid Identification test
Principle
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42. Rapid Identification test
Principle
TB Check MPT64 is based on an immuno-chromatographic assay
principle.
A droplet of the positive culture is placed on the lateral flow strip,
containing nitrocellulose membrane, gold conjugate pad and
absorbent pad.
On the strip the secreted MPT64 antigens are marked with gold and
migrate to a specific binding site. (Containing mouse anti-MPT64).
This reaction (with epitope) leads to a gold accumulation at the binding
site and subsequently to a visible band on the strip.
The control area shows the efficiency of the gold binding – therefore,
valid results are always guaranteed.
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