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Bacteriology

Clostridium botulinum cover image
Anaerobic Bacteriology

Clostridium botulinum: Properties, Pathogenesis and Laboratory Diagnosis

May 1, 2020 Acharya Tankeshwar 0

Clostridium botulinum is gram-positive, endospore-forming bacilli which resemble a tennis racket appearance due to the presence of spores at the sub-terminal end. It produces an extremely lethal neurotoxin called botulinum toxin and causes botulism, a […]

Bacteriology

Radiation Sterilization: Types, Mechanism, and Applications

April 24, 2020 Acharya Tankeshwar 1

Radiation is currently used for sterilization and decontamination in the medical supplies (surgical supplies, vaccines, and drugs) and food industries. Two types of radiations are available; ionizing and non-ionizing. Radiation sterilization is not widely used […]

Yersinia pestis, major features
Bacteriology

Yersinia pestis: Properties, Disease and Laboratory Diagnosis

April 24, 2020 Acharya Tankeshwar 0

Yersinia pestis is gram-negative rods responsible for highly fatal zoonotic disease, plague. Plague is one of the greatest killers known to mankind with at least three pandemics reported in history. It is transmitted to humans […]

Borrelia in dark-field microscope
Bacteriology

Dark-field Microscopy: Principles, Use, Advantages and Limitations

April 21, 2020 Nisha Rijal 0

Dark-field microscopy is a technique that can be used for the observation of living, unstained cells and microorganisms. In this microscopy, the specimen is brightly illuminated while the background is dark. It is one type […]

Bacillus anthracis important properties
Bacteriology

Bacillus anthracis: Properties, Pathogenesis and Laboratory Diagnosis

April 21, 2020 Acharya Tankeshwar 0

Bacillus anthracis, the most notorious pathogen of the genus Bacillus, is the causative agent of a serious zoonotic disease called anthrax. Anthrax is primarily a disease of wild and domestic herbivorous mammals. It is one […]

Properties of Streptococcus agalactiae
Bacteriology

Streptococcus agalactiae (GBS): Properties, Pathogenesis and Laboratory Diagnosis

April 19, 2020 Acharya Tankeshwar 0

Streptococcus agalactiae, also known as Group B Streptococcus (GBS), is a major cause of neonatal sepsis and meningitis. Other infections caused by Group B Streptococci include postpartum endometritis and bacteremia among pregnant women and pneumonia, endocarditis, skin […]

Listeria monocytogenes in Gram and Culture
Bacteriology

Listeria monocytogenes: Properties, Pathogenesis, and Lab Diagnosis

April 11, 2020 Acharya Tankeshwar 0

Listeria monocytogenes is a facultative intracellular Gram-positive coccobacilli responsible for listeriosis, one of the serious food-borne infections. Other important distinguishing properties of this organism are as follows; It shows tumbling type of motility at 25°C […]

virulence factors of Listeria monocytogenes
Bacteriology

Virulence factors of Listeria monocytogenes

April 11, 2020 Acharya Tankeshwar 0

Listeria monocytogenes is a facultative intracellular pathogen that is able to adhere to, invade, and survive within mammalian cells, including macrophages. It is a food-borne pathogen responsible for listeriosis, one of the deadliest foodborne infections […]

Toxins of Clostridium perfringens
Anaerobic Bacteriology

Toxins of Clostridium perfringens and their roles

April 6, 2020 Acharya Tankeshwar 0

Clostridium perfringens is a Gram-positive, anaerobic, spore-forming rod. It produces at least 12 different toxins, which are broadly classified as “major toxins” and “minor toxins”. Certain strains also produce enterotoxin and neuraminidase. These toxins are responsible for […]

Acidophile, Neutrophile, Alkaliphile
Bacteriology

pH Requirements of Microorganism

April 1, 2020 Acharya Tankeshwar 1

pH scale is used to express the acidity or alkalinity of a solution on which neutrality is pH 7. The pH scale extends from pH 0.0 to pH 14.0, and each pH unit represents a […]

Molecular structure of common beta-lactam antibiotics
Antibiotic Resistance

Beta-Lactam Antibiotics: Mechanism of Action and Resistance

March 31, 2020 Acharya Tankeshwar 0

Beta-lactam antibiotics are those that contain 4-member, nitrogen-containing, beta-lactam ring at the core of their structure. This ring mimics the shape of the terminal D-Ala-D-Ala peptide sequence that serves as the substrate for cell wall […]

Minimum Inhibitory Concentration and Mininum Bactericidal Concentration
Antibiotic Resistance

Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC)

March 30, 2020 Acharya Tankeshwar 0

Minimum Inhibitory Concentration (MIC) is defined as the lowest concentration (expressed as mg/L or μg/μL) of an antimicrobial agent that inhibits the visible in-vitro growth of microorganisms. The MIC test determines the antimicrobial activity of […]

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    December 15, 2020 0
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    Antigen Testing for COVID-19: Principle, Procedure, Results and Interpretations
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    November 19, 2020 4
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    Francisella tularensis: Properties, Pathogenesis, and Laboratory Diagnosis
    October 13, 2020 0
  • Burkholderia pseudomallei
    Burkholderia pseudomallei: Properties, Pathogenesis and Laboratory Diagnosis
    October 9, 2020 1

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