TypesofStrepThroat_ES - hemolytic and no hemolysis as...

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Types of Strep Throat Group A beta-hemolytic streptococci ( Streptococcus pyogenes ) are the most common bacterial cause of pharyngitis. Streptococcal sore throat resembles (and cannot be reliably distinguished clinically from) pharyngitis caused by adenoviruses, Epstien-Barr virus, Arcanobacterium haemolyticum (which also may cause a rash), and other agents. 2010 Current Medical Diagnosis and Treatment Streptococci are group of Gram-positive, catalase-producing cocci that appear in chains. They can be aerobic, anaerobic, or facultative and are cultured on blood agar media: complete hemolysis is identified as alpha-hemolytic, incomplete hemolysis as beta-
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Unformatted text preview: hemolytic, and no hemolysis as gamma-hemolytic streptococci. The beta-hemolytic are the most common pathogenic type ● Lancefield classified the beta-hemolytic streptococci into groups, labeled A through O. ● The group A beta-hemolytic streptococci are the most common of all pathogenic streptococci Humans are the only reservoir of group A beta-hemolytic streptococci. Highest incidence is in patients younger than 10 years. Crowded conditions and person-to-person transmission are responsible for it’s perpetuity. Comp. Rev. for Cert. and Recert. Examinations for Physician Assistants 4 th Ed....
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