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Hemolytic Streptococci Identification

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									Hemolytic Streptococci Identification
 Hemolysins – enzymes that attack RBC’s


 Alpha Hemolytic Streptococci


 Beta Hemolytic Streptococci


 Gamma Hemolytic Streptococci
Alpha Hemolytic Streptococci
 Secrete hemolysins that cause incomplete lysis of RBC’s
Beta Hemolytic Streptococci
 Secrete hemolysins that cause the complete lysis of RBC’s
Gamma Hemolytic Streptococci
 Do not secrete any hemolysins
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
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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