MYP Agar (Mannitol Yolk Polymyxin B) Difco 281010, 500g. Use with Egg Yolk Enrichment 50% and Antimicrobic Vial P for presumptive identification of B. cereus in foods. MYP Agar (Mannitol Yolk Polymyxin B) Difco 281010 - buy online through Voigt Global Distribution, your dealer distributor for all BBL DIFCO BD Microbiology products.