Bacillus cereus (Mannitol Egg Yolk Polymyxin – MYP) Agar

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Bacillus cereus (Mannitol Egg Yolk Polymyxin – MYP) Agar

Bacillus Cereus (Mannitol Egg Yolk Polymixin – MYP) Agar

Intended for the selective enumeration of Bacillus cereus in food samples the medium uses two reactions (Mannitol fermentation and Lecithinase production) to differentiate Bacillus cereus from other members of the species. As Bacillus cereus is Mannitol Negative the colonies are pink in colour due to the presence of Phenol Red Indicator. Lecithinase production (from the Egg Yolk) is indicated by a white precipitate around the colonies. Polymixin is added as the selective agent to inhibit coliforms.

NB: It should be noted that some Proteus spp and gram positive cocci may grow on this medium.

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Pack Size

10 x 90mm Plates

Shelf Life (days)

Storage Temp (°C)




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Product Description

Organisms Ref. No Result
Bacillus cereus NCTC 10320 Pink colonies with white halo
Bacillus subtilis NCTC 10400 Yellow colonies
Escherichia coli NCTC 12241 Inhibited