GPC Biochemical Quiz

Catalase will differentiate Staphylococcus aureus from Staphylococcus epidermidis.

• True

• False

Gram positive cocci in clusters describes the genus Staphylococcus.

• True

• False

Gram positive cocci in chains describes the genus Streptococcus.

• True

• False

Gram positive cocci in clusters

catalase positive

coagulase positive

• Staphylococcus aureus

• Staphylococcus epidermidis

• Streptococcus pyogens

• Streptococcus pneumoniae

Gram positive cocci in chains

Catalase negative

Beta hemolytic

Taxo A positive (susceptible)

PYR positive

• Streptococcus pyogenes

• Streptococcus agalactiae

• Streptococcus pneumoniae

• Enterococcus

Gram positive cocci in chains

Catalase negative

Beta hemolytic

CAMP positive

• Streptococcus agalactiae

• Streptococcus pyogenes

• Streptococcus pneumoniae

• Enterococcus

Gram positive cocci in pairs

Catalase negative

Alpha hemolytic

Taxo P positive (susceptible)

• Streptococcus pneumoniae

• Streptococcus pyogenes

• Streptococcus agalactiae

• Enterococcus

Streptococcus pyogenes

• Taxo A

• alpha hemolysis

• CAMP test

• Coagulase

• Beta hemolysis

Streptococcus pneumoniae

• alpha hemolysis

• Taxo A

• CAMP test

• Coagulase

• Taxo P

Staphylococcus aureus

• CAMP test

• Catalase

• Taxo A

• alpha hemolysis

• Coagulase