SFP Agar Base BD Difco™ 500 g. Shahidi Ferguson Perfringens Agar Base. TSC Agar Base. For detection and enumeration ofClostridium perfringens in foods use with:- Egg Yolk Enrichment 50% (Cat. Nos. 233471 and 233472) and- Antimicrobic Vial P (Cat. No. 232681) and- Antimicrobic Vial K (Cat. No. 233391)