Staphylococcus aureus: CAP agar

Sheep blood agar with colistin and aztreonam (CAP)

isolation of gram-positive bacteria on CAP agar

Staphylococcus aureus and Enterococcus faecalis on CAP Agar (sheep blood agar with colistin and aztreonam).
Cultivation 24 hours, aerobic atmosphere, 37°C.

CAP agar is a medium used for isolation of Gram-positive bacteria. Colonies of S.aureus are surrounded by a zone of complete hemolysis (beta-hemolysis), colonies of E.faecalis are without hemolysis (gamma-hemolysis).