Recent Articles

Hydrogen sulphide (H2S) production test

Hydrogen sulphide (H2S) production test is used for the detection of hydrogen sulphide (H2S) gas produced by an organism. It is used mainly to assist in the identification of members of family Enterobacteriaceae and occasionally to differentiate other bacteria such as Bacteroides sps and Brucella sps. H2S is produced when sulphur – containing amino acids […]

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 from the aerosolized transmission of organisms. Any procedure that involves the risk of generating aerosols should be handled in a BSC. Samples sent to microbiology […]

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 or when the results of a coagulase test are difficult to interpret. Views – 8377 Related Posts:Definition of EnterococcusAcetamide Utilization Test: Principle, Procedure,…Oxidation Fermentation (OF) […]

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 humans is usually 1-3 months but ranging from as few as 5 days to longer than 2 years after initial exposure, is more variable than […]

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, fishes, insects and plants. Rhabdoviruses infecting mammals are included in two genera: Lyssavirus-  Rabies, Lagos bat virus, Mokola, Duvenhage, Australian bat Vesiculovirus- Vesicular stomatitis virus […]

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 for the diagnosis of infectious diseases. Isolation of anaerobes from clinical specimens, determination of the numbers of anaerobes in the specimen, and establishing the clinical […]