Staphylococcus aureus: yellow colored colony on agar

Convex, yellow colored colony of S.aureus on blood agar

convex, yellow colored colony of staph aureus

Staphylococcus aureus colony on sheep blood agar. Cultivation 24 hours, aerobic atmosphere, 37°C.
A circular, convex colony with an entire margin, yellow pigmented, surrounded by a zone of beta-hemolysis. Compare with colonies of S.aureus on triptic soy agar (here).