Antimicrobial Inhibitor Test Agar pH 7.2, Granulated is recommended for residual analysis of antimicrobial components in meat and organ samples, using Bacillus subtilis (ATCC 6633) as test organism by agar diffusion procedure and EEC Four-Plate-Test. In addition to washing, treatments with antimicrobial compounds such as chlorine and organic acids are used to sanitize muscle, therefore it is important to carry out residual testing of meat food.