Giving basic concepts regarding culture media and its classification on the basis of different properties like physical state, chemical composition and utility purposes.
When fresh liquid medium is inoculated with a given number of bacteria and incubated for sufficient period of time, it gives a characteristic growth pattern of bacteria.
If the bacterial population is measured periodically and log of number of viable bacteria is plotted in a graph against time, it gives a characteristic growth curve which is known as growth curve or growth cycle.
Microbiology essentially began with the development of the microscope. Although others may have seen microbes before him, it was Antonie van Leeuwenhoek, a Dutch draper whose hobby was lens grinding and making microscopes, who was the first to provide proper documentation of his observations.
Giving basic concepts regarding culture media and its classification on the basis of different properties like physical state, chemical composition and utility purposes.
When fresh liquid medium is inoculated with a given number of bacteria and incubated for sufficient period of time, it gives a characteristic growth pattern of bacteria.
If the bacterial population is measured periodically and log of number of viable bacteria is plotted in a graph against time, it gives a characteristic growth curve which is known as growth curve or growth cycle.
Microbiology essentially began with the development of the microscope. Although others may have seen microbes before him, it was Antonie van Leeuwenhoek, a Dutch draper whose hobby was lens grinding and making microscopes, who was the first to provide proper documentation of his observations.
Microbiology is the study of organisms that are usually too small to be seen by the unaided eye; it employs techniques—such as sterilization and the use of culture media—that are required to isolate and grow these microorganisms.
Contributions of Various scientist for the development of Microbiology field.
1. Antony Van Leeuwenhoek
2. Edwerd Jenner
3. Louis Pasteur
4. Joseph Lister
5. Robert Koch
6. Paul Ehrlich
7. Alexander Fleming
Similar to Microbiology: Introduction & history (20)
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
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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
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Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
2. What
is
Microbiology
Study of:
Organisms of microscopic size
Classification
Morphology
Physiology
Metabolism
Distribution in nature
Relationship to each other and other living organisms
3. Why to study the
Subject
Distribution in Nature:
• Omnipresent: nearly everywhere in Nature
• Grow where they get food moisture and temperature suitable for
growth
• Air
• Soil
• Oceans
• Food we eat
• Surfaces of our body and inside alimentary canal
10. Bacteria
Size:
0.2-1.5 by 3-5 µm
Important Characteristics:
• Prokaryotic
• Unicellular
• Simple Internal structure
• Grow on artificial laboratory media
• Reproduction asexual (mostly simple cell division)
Practical significance:
• Some cause diseases
• Some perform role in natural cycling of elements and increase soil
fertility
• Manufacture of valuable compounds in Industry
11.
12. Viruses
Size:
0.015-0.2 µm
Important Characteristics:
• Do not grow on artificial media
require living cells within which they reproduce
• Obligate parasites
• Electron microscopy required to observe
Practical significance:
• Cause diseases in humans animals plants
• Also infect microorganisms
13.
14. Fungi (Yeasts)
Size:
5.0-10.0 µm
Important Characteristics:
• Eukaryotic
• Unicellular
• Grow on artificial laboratory media
• Reproduction asexual (cell division/ budding) or sexual
Practical significance:
• Some cause diseases
• some are used as food supplements
• Manufacture of alcoholic beverages
15.
16. Fungi (Molds)
Size:
2.0-10.0 µm by several mm
Important Characteristics:
• Eukaryotic
• Multicellular
• Many distinctive structural features
• Cultivated on artificial laboratory media
• Reproduction asexual or sexual
Practical significance:
• Decomposition of many materials
• Industrial production of many chemicals like antibiotics
• Can cause diseases
17.
18. Protozoa
Size:
2.0-200 µm
Important Characteristics:
• Eukaryotic
• Unicellular
• Some cultivated on laboratory media while some are intracellular
parasites
• Reproduction asexual or sexual
Practical significance:
• Some cause diseases
• Food for aquatic animals
19.
20. Algae
Size:
1.0 µm to several centimeters
Important Characteristics:
• Eukaryotic
• Unicellular or Multicellular
• Photosynthetic
• Most occur in aquatic environments
• Reproduction asexual or Sexual
Practical significance:
• Production of food in aquatic environments
• Source of food and in Pharmaceuticals
• Some produce toxic substances
23. Varo & Columella [1st century BC]: Diseases caused by
invisible organisms (Animalia minuta)
Girolamo Fracastorius of verona [1546]: Living germs
(contagium vivum) cause infectious diseases
Von Plenciz [1762]: Each disease caused by different agent
Kircher [1659]: reported finding minute worms in blood of
plague patients.
24. Antonie Van Leeuwenhoek [1632-1723]:
• 1st to observe and describe single celled
organisms, “animalcules”, we now refer to as
microorganisms.
• Described different morphological forms of
bacteria
• 1st to record observations of muscle
fibers, bacteria, spermatozoa and blood flow in
capillaries (small blood vessels).
28. Earliest discovery of pathogenic role of microorganism:
Augustino Bassi [1835]:
Muscardine diseases of silk worms was caused by a fungus.
Oliver Holmes [1840] & Ignaz Semmelweis [1846]:
Concluded that puerperial sepsis was transmitted by
contaminated hands of obstetricians, nurses and medical
students.
This could be prevented by washing hands in antiseptic
solutions.
29. Edwerd Jenner:
• Observed that the milk maids who had milder form of cowpox
were not prone to Smallpox.
• After observing cases of cowpox and smallpox for few years, In
1796 he removed the fluid of a cowpox from milkmaid and
inoculated James Phipps, an eight-year-old boy, who soon came
down with cowpox.
• Six weeks later, he inoculated the boy with smallpox. The boy
remained healthy.
• Jenner had proved his theory that the pus in the blisters which
milkmaids received from cowpox protected milkmaids from
smallpox.
30. Louis Pasteur [1822-1895]:
Father of Microbiology
• Trained chemist from France
• Established that Fermentation
caused by microbial agents
was
• Demonstrated anaerobic fermentation by
both bacteria and yeasts (bacteria
produce acid and yeast produce alcohol)
• Developed pasteurization to prevent spoilage of wine by
bacteria
• Noted that different types of fermentations were associated with
different kinds of microbes
• Development of methods and techniques of Bacteriology
• proved that microbes arise only from their like
31. • Introduction of sterilization techniques: development of steam
sterilizer, autoclave and hot-air oven
• Studies on Anthrax, Cholera and hydrophobia
• Introduced live attenuated (weakened) vaccines
[Accidental observation: chicken cholera bacillus cultures left for
several weeks lost their pathogenicity but retained their ability to
protect the chickens from infection]
Chicken
inoculated
Pure culture of
chicken Cholera
bacteria
8 weeks old
Remains
Healthy
33. • Then he attenuated anthrax bacillus by incubation at high
temperatures (42 C-43 C) and proved that inoculation of such
bacilli in animals introduced protection against anthrax
• He coined
preparations.
the
term
‘Vaccine’
for
such
prophylactic
• While working on rabies, he could not isolate any
microorganism from dog and man but suggested that causative
agent of rabies was too small to be seen by microscope.
34. Spontaneous generation versus Biogenesis
• Aristotle (384-322 BC) proposed that animals might originate
spontaneously from soil, plants or other unlike animals.
• His influence was strongly felt even in the 17th century
• In 1668, Francesco Redi disproved such generation of
organisms from non-living things
35. John Needham (1745):
heated Nutrient Fluids and poured them into flasks and covered
with corks → fluid turned turbid showing presence of
microorganisms.
Spallanzani (1765):
Similar to Needham’s Experiments
Boiled the beef broth for hour and then immediately sealed flasks
No growth was observed in the broth
Louis Pasteur (1861)
• finally disproved spontaneous generation after many years of
debate
• Boiled broth in swan-necked flasks
36.
37. Joseph Lister [1827-1912]:
Father of Antiseptic surgery
• Professor of surgery
• Applied Pasteur’s work and introduced
Antiseptic techniques in Surgery
• Use of Carbolic acid in Antiseptic
surgery
• Resulted in drop in morbidity and
mortality due to surgical sepsis
38. Robert Koch [1843-1910]:
Father of Bacteriology
• Introduced methods for isolation of
pure culture
• use of solid media for isolation of
bacteria
• Staining techniques
• discovered
Anthrax
bacillus
(1876), Tubercle bacillus (1882) and
cholera vibrios (1883)
39. Koch’s postulates
Microorganism can be accepted as the causative agent
of an infectious disease only if following conditions are
fulfilled:
Disease agent must be present in every organism suffering from
the disease but should be absent in healthy organism.
It should be possible to isolate the microorganism in its pure
culture from lesion of the disease
The isolated microorganism when introduced into suitable
laboratory animal should produce the similar disease
It should be possible to re-isolate the microorganism in its pure
culture from lesions produced in experimental animals.
40.
41. Paul Ehrlich [1854-1915]:
Father of Chemotherapy
• Applied stains to cells and tissues for
study of their functions.
• Reported the
tubercle bacillus
acid-fast
nature
of
• Discovered Salvarsan (derivative of
arsenic) sometimes called as ‘Magic
Bullete’
• Salvarsan: capable
spirochetes of syphilis.
of
destroying
• Gave rise to new branch of medicine:
‘Chemotherapy’
42. • In 1892, Ivanovsky removed the bacteria from diseased tobacco
plant extract using some filters.
• This extract was responsible for producing tobacco mosaic
disease in healthy plant
• Beijerinck (1898) confirmed these findings and coined the term
‘Virus’ for such filterable infectious agents.
• Loeffler & Frosch (1898):
Foot and mouth disease of cattle
caused by similar filter-passing
viruses.
• Landsteiner & Popper (1909):
Virus responsible for Poliomyelitis
• Ruska (1934):
introduced Electron microscope
43. Alexander Fleming [1928]:
• Discovery of 1st Antibiotic
• Accidentally discovered Penicillin produced by a fungus
Penicillium
• Left his Staphylococcus culture on an agar plate for 2 weeks →
went on vacation → came back & found mold on his plate which
prevented bacterial growth
44.
45. Elie Metchnikoff:
• Described how Leukocytes ingest disease producing bacteria in
the body
• Called such cells ‘Phagocytes’ & the process ‘Phagocytosis’
• Suggested that Phagocytes are the body’s 1st & most important
line of defense against infection.