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Hemolytic Streptococci Identification

Hemolytic Streptococci Identification. Hemolytic Streptococci Identification. Hemolysins – enzymes that attack RBC’s Alpha Hemolytic Streptococci Beta Hemolytic Streptococci Gamma Hemolytic Streptococci. Alpha Hemolytic Streptococci.

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Hemolytic Streptococci Identification

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  1. Hemolytic Streptococci Identification

  2. Hemolytic Streptococci Identification • Hemolysins – enzymes that attack RBC’s • Alpha Hemolytic Streptococci • Beta Hemolytic Streptococci • Gamma Hemolytic Streptococci

  3. Alpha Hemolytic Streptococci • Secrete hemolysins that cause incomplete lysis of RBC’s

  4. Beta Hemolytic Streptococci • Secrete hemolysins that cause the complete lysis of RBC’s

  5. Gamma Hemolytic Streptococci • Do not secrete any hemolysins

  6. Lancefield Groups – Rebecca Lancefield • “C” Antigen (Carbohydrate) • Group A Humans • Group B Cattle & Humans • Group C Wide Variety • Group D Enterococci & cheese • Group E Swine • Group F Humans • Group G Humans, Monkeys & dogs • Group H • Group K • Group L Dogs • Group M Dogs • Group N Dairy Products • Group O

  7. GABHS • Group A Beta Hemolytic Streptococci • “Baddest of the Bad” • 5 – 10% of the normal population are considered to be asymptomatic carriers of GABHS

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