Neisseria gonorrhoeae and Neisseria meningitidis are Gram-negative diplococci (kidney bean-shaped) with flattened sides. They are characteristically found inside polymorphonuclear leucocytes. These...
Category: Bacteriology
Elek test is an in vitro immunoprecipitation (immunodiffusion) test to determine whether or not a strain of Corynebacterium diphtheriae is toxigenic. A test strip of filter paper containing...
Streptococcus Pyogenes (GAS): Characteristics, Diseases, Tests
Popularly known as "flesh-eating bacteria", Streptococcus pyogenes is one of the pathogenic gram-positive cocci. Streptococcus pyogenes, or Group A streptococcus (GAS) is mostly known for...
Staphylococcus and Streptococcus are the two most common pathogenic gram-positive cocci of medical importance. They share some important properties. Streptococcus spp (S. pyogenes and S....
Modified oxidase test (microdase) is recommended for Gram-positive, catalase-positive cocci, only. The microdase test is a rapid method to differentiate Staphylococcus (-ve) from Micrococcus +ve) by...
The motility test is used to determine whether an organism is motile or non-motile. Motile organisms contain flagella which helps them to travel beyond the point of inoculation. Motile bacteria are...