clasification of Streptococci according to action on blood agar
11.B-hemolytic Streptococci:colonies are surrounded by clear zone of hemolysis due to complete hemolysis
ex:Strptococcuspyogens and Streptococcus agalactia
2.alphahemolytic Streptococci:colonies are surrounded by green color due to incomplete
hemolysis
ex:Streptococcus viridans and Streptococcus pneumoniae
3.non hemolytic Streptococci

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