Online Microbiology and Biology Study Notes
What is Streptococcus agalactiae? Streptococcus agalactiae is a Gram-positive, non-motile, non-spore-forming coccus that is the only member of the Group B of the Lancefield antigen grouping. It is a β-hemolytic, catalase-negative, facultative anaerobe that consists of ten different serotypes, separated on the basis of the immunologic reactions of their capsular polysaccharide. Because it is the only species present in the …
What is CAMP Test? CAMP (Christie–Atkins–Munch-Peterson) test is a biochemical test used to differentiate Streptococcus agalactiae from other beta-hemolytic Streptococci. S. agalactiae is the only member of the Group B Streptococci which is separated from other beta-hemolytic Streptococci by the demonstration of a large area of hemolysis when grown with Staphylococcus aureus. This test is used for the presumptive identification …
Read moreCAMP Test- Principle, Procedure, Types, Results, Uses, Limitations
Biochemical Test of Bacteria Biochemical reactions are very important in the identification of bacterial isolates and in the identification of different bacterial species. These tests depend on the presence of certain enzymes, such as catalase, oxidase, urease, gelatinase, etc., produced by the bacteria. Different bacteria produce varying spectra of enzymes. For example, some enzymes are necessary for the bacterium’s individual …
Biochemical Test of Streptococcus agalactiae Basic Characteristics Properties (Streptococcus agalactiae) CAMP Positive (+ve) Capsule Positive (+ve) Catalase Negative (-ve) Coagulase Negative (-ve) Flagella Non-flagellated Gram Staining Positive (+ve) Hemolysis Beta Hemolysis Motility Non-motile OF (Oxidative-Fermentative) Facultative anaerobes Oxidase Negative (-ve) PYR Negative (-ve) Shape Cocci Spore Non-sporing Urease Negative (-ve) VP (Voges Proskauer) Variable Fermentation of Adonitol Negative (-ve) Arabinose …