Mannitol positive and mannitol negative colonies on mannitol salt agar (Chapman medium)
Staphylococcus aureus and Staphylococcus epidermidis on mannitol salt agar.
Cultivation 24 hours in an aerobic atmosphere, 37°C.
Yellow, mannitol positive Staphylococcus aureus with yellowish halo around colonies. Whittish, mannitol negative colonies of Staphylococcus epidermidis.