Hanging drop test is a confirmatory test to identify if an organism is motile or non motile. It can also be used for the presumptive identification of organism on the basis of its characteristic motility like Vibrio cholerae which has a darting type of motility in stool sample of patients with cholera. This test is prepared […]
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 […]
Clostridium perfringens (Clostridium welchii) is a normal inhabitant of large intestine of human and animal and found in feces and skin of perineum, buttocks and thigh. Spores are commonly found in soil, dust and air. Morphology It is a rectangular gram positive bacillus with rounded or truncated ends usually occurring in singles, chains or small […]