Classification of Streptococci

Hebah
Classification of Streptococci

Streptococci

Basis -O2 requirement


Aerobes and faculative anaerobes Obligate anaerobes
Peptostreptococci

Basis -Hemolysis



1.Alpha 3.Gamma
(the viridans group) (The enterococcus group)


Classified into species by Physiological and biochemical properties


2.Beta
(The hemolytic streptococci)

Serological Basis - Group specific C carbohydrate antigen


19 Lancefield Groups ( A-H , K-U )

Group A – Streptococcus pyogens

Serological typing (Basis - M Protein)
Griffith types (1,2,3,etc..)