Bacteria photos: Staphylococcus aureus mannitol positive colonies

Mannitol positive and mannitol negative colonies on mannitol salt agar (Chapman medium)

mannitol salt agar plate with S.aureus and S.epidermidis

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.