Streptococcus agalactiae, also known as Group B Streptococcus (GBS), is a major cause of neonatal sepsis and meningitis. Other infections caused by Group B Streptococci include postpartum endometritis and bacteremia among pregnant women and pneumonia, endocarditis, skin […]
Last updated on January 28th, 2021Skin is the body’s largest and thinnest organ which serves as an anatomical barrier between the sterile internal organs and the external environment which is teemed with microorganisms. Break in […]
Last updated on August 26th, 2019Streptococcus pyogenes is the leading cause of uncomplicated bacterial pharyngitis and tonsillitis commonly referred to as strep throat. Acute diseases associated with Streptococcus pyogenes occur chiefly in the respiratory tract (sinusitis, otitis), bloodstream (sepsis, endocarditis, meningitis), or the skin (impetigo, […]
Last updated on December 10th, 2019Staphylococcus 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 […]
Last updated on August 26th, 2019Popularly 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 […]
Last updated on May 4th, 2021Staphylococcus and Streptococcus are the two most common pathogenic gram-positive cocci of medical importance. They share some of the important properties. Common characteristics shared by these gram-positive cocci are: Nonmotile, […]
Last updated on May 2nd, 2019Hippurate is the glycine conjugate of benzoic acid. When hippurate is hydrolysed by an organism glycine and benzoic acid are formed. In the classical test (48 hours), The benzoic acid […]
Last updated on December 13th, 2020Streptococci are Gram positive cocci either diplococci (lanceolate shaped; S. pneumoniae) or in chains. They are catalase negative (An important test which differentiate it from another cocci, Staphylococci). This fastidious […]
Last updated on April 20th, 2019Bile-esculin test is widely used to differentiate Enterococci and Non-enterococcus group D streptococci, which are bile tolerant and can hydrolyze esculin to esculetin, from non-group D viridans group streptococci, which […]
Last updated on April 26th, 2018Salt Tolerance Test is used in the identification of enterococcal group D Streptococcus on the basis of their salt tolerance. The ability of the bacteria to grow in the presence […]
Last updated on May 6th, 2021Pyrrolidonyl Arylamidase (PYR) test is a rapid test that is used for the presumptive identification of group A beta-hemolytic Streptococci and Enterococci. PYR test is also used for the identification […]
Last updated on June 20th, 2020Catalase is an enzyme, which is produced by microorganisms that live in oxygenated environments to neutralize toxic forms of oxygen metabolites; H2O2. The catalase enzyme neutralizes the bactericidal effects of […]
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