Author Archives: Prasil Pradhan
Biological Safety Cabinets: types and use
Biological safety cabinets (BSCs) are a form of engineering control that is used throughout the microbiology laboratory. These hoods are a type of containment barrier that protects the laboratory worker…
DNase test (deoxyribonuclease test)
DNase test is useful in the identification of Staphylococcus aureus which produces deoxyribonuclease (DNase) enzymes. This test is particularly useful when plasma is not available to perform a coagulase test…
Clinical manifestations of Rabies
Five general stages of rabies are recognized in humans: a) Incubation b) Prodrome c) Acute neurologic period d) Coma and e) Death (or, very rarely, recovery). Incubation Incubation period in…
Rabies virus: Structure, Pathogenesis and Modes of transmission
Rabies is caused by Rabies virus. It belongs to Rhabdoviridae family. The viruses included in this family are rod shaped, enveloped, single stranded RNA virus. They infect mammals, reptiles, birds,…
Specimen collection, transport and methods for specimen collection for diagnosis of anaerobes
Proper collection of specimens is of utmost importance to avoid contamination of the collected specimen with normal microbial flora and prompt transport to the laboratory for processing is very essential…
Characteristics that a microbe must possess to cause infection in human
In order to cause infection, a successful pathogen must be able to: Enter and establish in the human host Acquire nutrients from the host Avoid or circumvent the host’s innate…
FAQs on Ebola (Signs and Symptoms, transmission and Laboratory diagnosis)
What is Ebola? Ebola, previously known as Ebola hemorrhagic fever, is a severe, most often fatal disease in humans and nonhuman primates. Ebola is a rare and deadly disease caused…
Definition, Classification, Morphology and cultural Characteristics of Shigella
Classification Kingdom: Bacteria Phylum: Proteobacteria Class: Gamma Proteobacteria Order: Enterobacteriales Family: Enterobacteriaceae Genus: Shigella Type species: S. dysenteriae Definition of Shigella: They are fermentative, facultative anaerobic non spore forming…
Pathogenesis of Shigella
Shigella is a common cause of bacterial diarrhoea worldwide, especially in developing countries. Humans are the only natural reservoir for disease. Transmission can occur via direct person-to-person spread, as well…
Voges Proskauer test (VP test): Principle, Procedure, Interpretation and Quality Control
Voges-Proskauer test is one of the tests used for identification of Enterobacteriaceae. It is usually performed alongside the methyl red test since both tests are performed on cultures grown in…