Bacteria photos: Staphylococcus aureus

Staphylococcus aureus nonpigmented strain on blood agar

nonpigmented, white Staphylococcus aureus colonies on blood agar

Staphylococcus aureus, CAP agar with 5% defibrinated sheep blood. Cultivation 24 hours, aerobic atmosphere, 37°C.

Not all strains of S.aureus are yellow pigmented. Notice weak beta-hemolysis around colonies of S.aureus (detail in the upper-right corner).