This HiDip slide is recommended for total bacterial count and detection of Staphylococcus aureus. Plate Count Agar (PCA): Recommended for determination of plate counts of microorganisms in food, water, waste water & clinical . Also called as Standard Methods Agar. It is recommended by APHA and FDA for determination of counts. V.J.Agar : Recommended for the enumeration of S.aureus. Highly selective - High glycine content and lithium chloride. Detects coagulase positive Staphylococcus aureus. Based on mannitol fermentation and tellurite reduction. S.aureus appears as black coloured colonies with yellow halo