Add a drop of H2O2 to a bacterial sample, if bubbles form it is positive, if not it is negative.

Staph: +

Strep: -

Add bacteria to a sample of blood plasma. If they make the plasma coagulate then they are coagulase +.

staphylococcus aureus is +

Staphylococcus epidermis is -

Used to identify step using a blood agar plate

If the Blood Agar Plate Test reveals that the strep bacteria is alpha hemolytic then a disk treated with optochin may be added.

inhibited growth: streptococcus pneumoniae

uninhibited growth: alpha streptococci

Alpha strep are normal flora of the mouth

Used to separate diffrent classes (A, B, C, D, etc.) of beta hemolytic streptococcus. A is the only one that is very dangerous and responsible for erysipelas, scarlet fever, and septic sore throat.

A bacitracin disk is added to the blood agar plate.

Type A will show sensitivity, others will not