Clostridioides (formerly Clostridium) difficile causes life-threatening diarrhea. Clostridioides difficile infection (CDI) is a leading cause of hospital associated gastrointestinal illness. This infections mostly occur in people who have had recent medical care (hospitalized or recently hospitalized […]
Staphylococcus and Micrococcus both are Gram positive cocci (GPC). Both of these cocci are non-motile, non-sporing and Catalase Positive. Both of these organisms are normal flora of skin and mucous membranes of man and animals. Member […]
Neisseria gonorrhoeae and Neisseria meningitides are Gram negative diplococci (kidney bean-shaped) with flattened sides. They are characteristically found inside polymorphonuclear leucocytes. They are non-sporing, non-motile and oxidase positive. They have exacting growth requirements and do […]
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 diphtheria antitoxin is placed in the center […]
All living cells can be classified as either prokaryotic or eukarytoic. Prokaryotic cells lack a nucleus and other membrane enclosed structures, whereas eukaryotic cells have such structure. All prokaryotes are single-celled organism and all are […]
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 streptococcal sore throat (strep throat). It is a […]
Staphylococcus and Streptococcus are two most common pathogenic gram positive cocci of medical importance. They share some of the important properties. Common characteristics shared by of these gram positive cocci are: Non motile, Non Sporing, […]
“Gram positive cocci in clusters” may suggest Staphyloccocus species. “Gram positive cocci in pairs and chains” may suggest Streptococcus species or Enterococcus species. “Gram positive diplococci” may suggest Streptococcus pneumoniae. “Gram negative coccobacilli” may suggest Haemophilus […]
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