Hemolysis of Streptococci- Types and Examples with Images

Hemolysis of Streptococci- Types and Examples with Images

Introduction A genus Streptococcus is a heterogeneous group of Gram-positive bacteria. Various streptococci are considered as the normal microbial flora of animals and humans, while some species under favorable conditions can also cause diseases ranging from sub-acute infection to acute or even chronic diseases/infections. Streptococci are spherical organisms that grow in chains because of incomplete … Read more Hemolysis of Streptococci- Types and Examples with Images

CAMP Test- Principle, Procedure and Result Interpretation

CAMP Test- Principle, Procedure and Result Interpretation

CAMP Test- Principle, Procedure and Result Interpretation Objective of CAMP Test The Christie, Atkins, and Munch-Peterson (CAMP) test is used to differentiate group B streptococci (Streptococcus agalactiae–positive) from other streptococcal species. Listeria monocytogenes also produces a positive CAMP reaction. Principle of CAMP Test Certain organisms (including group B streptococci) produce a diffusible extracellular hemolytic protein … Read more CAMP Test- Principle, Procedure and Result Interpretation

Bile Solubility Test- Principle, Procedure and Result Interpretation

Bile Solubility Test- Principle, Procedure and Result Interpretation

Bile Solubility Test- Principle, Procedure and Result Interpretation Objective of Bile Solubility Test This test differentiates Streptococcus pneumoniae (positive–soluble) from alpha-hemolytic streptococci (negative–insoluble). Principle of Bile Solubility Test Bile or a solution of a bile salt (e.g., sodium desoxycholate) rapidly lyses pneumococcal colonies. Lysis depends on the presence of an intracellular autolytic enzyme, amidase. Bile salts lower … Read more Bile Solubility Test- Principle, Procedure and Result Interpretation

Bacitracin Susceptibility Test- Principle, Procedure and Result Interpretation

Bacitracin Susceptibility Test- Principle, Procedure and Result Interpretation

Bacitracin Susceptibility Test- Principle, Procedure and Result Interpretation Objectives of Bacitracin Susceptibility Test This test is used for presumptive identification and differentiation of beta-hemolytic group A streptococci (Streptococcus pyogenes– susceptible) from other beta-hemolytic streptococci. It is also used to distinguish staphylococci species (resistant) from micrococci (susceptible). Principle of Bacitracin Susceptibility Test The antibiotic bacitracin inhibits the … Read more Bacitracin Susceptibility Test- Principle, Procedure and Result Interpretation