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Introduction of Proteus mirabilis The genus Proteus was discovered in 1885 by Hauser and it is also named after a Greek god. Proteus is a member of the family, Enterobacteriaceae and it is a Gram-negative, oxidase-negative, fimbriated, motile, non-sporing rod-shaped bacterium without capsule and having a size …
Introduction of Bile Esculin test Bile esculin test is widely used to differentiate Enterococci from streptococci, other than streptococcus bovis as well as Yersinia enterocolitica from food and animal feeding stuff and Listeria monocytogenes which are bile tolerant and can hydrolyze esculin to esculetin, it reacts …
Introduction of Motility Test for Bacteria/ Hanging Drop Preparation Bacteria are motile due to having flagellum/flagella. On the flagella, bacteria are motile and non-motile and therefore some bacteria are motile (Vibrio cholerae, E. coli, Proteus species, etc.) whereas some others are non-motile like Klebsiella, Shigella, …
Introduction The genus Klebsiella is from the surname of German-Swiss microbiologist Edwin Klebs (1834–1913). Klebsiella is a member of the family, Enterobacteriaceae and it is a Gram-negative, oxidase-negative, fimbriated, non -motile, non-sporing rod-shaped bacterium with a prominent polysaccharide-based capsule and having a size of 0.5 to 0.8 …
Introduction of E. coli Escherichia coli is a member of the family, Enterobacteriaceae and it is a Gram-negative, aerobe, and facultative anaerobic, rod-shaped bacterium. The optimal temperature for growth is 36-37°C with most strains growing over the range 18-44 °C. It is a commensal that is found …
Introduction of Enterobacteriaceae The family Enterobacteriaceae was first proposed by Rahn in 1936 and it is a very large group of gram-negative bacteria that possess a number of common morphological and biochemical properties and similar DNA base compositions. The widely used systems for the classification …
Introduction of LF and NLF Gram-Negative Bacteria on MacConkey Medium MacConkey agar/ medium is recommended for use as a selective, differential, and indicator growth medium for the isolation of gram-negative bacilli including coliform organisms and enteric pathogens, on the basis of lactose fermentation. Peptones (meat …
Introduction of India Ink Preparation Cryptococcal meningitis occurs in immunodeficient patients and when meningitis is clinically suspected, for example, patients with HIV/AIDS, or when yeast cells with lymphocytes are detected when performing Cerebrospinal fluid (CSF) cell count or examining Gram smear, examine India ink preparation …