This medium is a selective chromogenic medium recommended for the isolation and enumeration of coagulase positive staphylococci in foods within 24 hours. This medium has an advantage over the traditional media which requires 48 hours Peptones in the medium supplies the essential nitrogenous compounds required for the growth. The chromogenic mixture incorporated in the medium is specifically cleaved by Staphylococcus aureus to give bluish green coloured colonies which are clearly visible against the opaque background