Streptococci

All but one is true about Streptococcus

• Catalse (+)

• Oxidase (-)

• Gas production (-)

• Non-motile

Has a C-Carbohydrate layer, except

• Pyogenic Group

• Enterococci Group

• Lactic Group

• Viridans Group

Can grow in 10C, 37C, 45C, 6.5% NaCl and Skimmed milk with methylene blue

• Pyogenic group

• Enterococci group

• Viridans group

• Lactic group

Classification of Streptococcus according to temperature requirement.

• Bergey's

• Smith and Brown

• Lancefield

Gamma hemolytic streptococcus

• Viridans

• S. pneumoniae

• S. pyogenes

• Enterococci

Group B streptococci

• Viridans

• S. pneumoniae

• S. pyogenes

• S. agalactiae

Brown color surrounding the colony

• Alpha hemolysis

• Beta hemolysis

• Gamma hemolysis

• Alpha prime hemolysis

• Double zone hemolysis

Clear zone of hemolysis

• Group A Strep

• Group B Strep

• Viridans Strep

• Both A and B

• Both B and C

Antiphagocytic

• M-protein

• Protein A

• Peptidoglycan

• All of the above

Honey-crusted lesions over the face and trunk with pruritis.

• S. aureus

• S. pyogenes

• Both

• Neither