Staphylococcus epidermidis and Staphylococcus aureus, colony morphology and hemolysis

golden staph and s.epidermidis

Yellow pigmented, beta-hemolytic colonies of S.aureus (coagulase-positive) and non-pigmented, non-hemolytic colonies of Staphylococcus epidermdidis (coagulase-negative staphylococci) on blood agar.