SOP: Production of Spores of Clostridium difficile for Use in the Efficacy Evaluation of Antimicrobial Agents Method ID: MB-28-04 Date: 6/19/2014 You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more. ATMP - MB-28-04 (PDF)(14 pp, 865 K, 6/19/14)