For the enumeration of B. cereus in foodstuffs and other samples. Bacillus cereus is a Gram-positive, rod shaped, facultatively aerobic spore forming organism. Its cells are large and sometimes form short chains or long strings with central to terminal ellipsoidal spores that do not distend the cell. Unstained globules within the cells occur when they are grown on glucose containing media. Presence of Bacillus cereus has been determined in foods related to outbreaks of illness since the early years of the 20th century. Since 1950s it is recognized as causative agent of food poisoning. Earlier isolation techniques used blood agar, relying on haemolysis and colony morphology for the detection of Bacillus cereus, and then a range of tests for confirmation. The main problem with those media was that they were not selective and were generally only useful in detecting high numbers of Bacillus cereus. Mannitol Egg Yolk Polymyxin Agar is a selective and differential medium developed by Mossel et al. The diagnostic features of the medium rely upon the failure of Bacillus cereus to utilise mannitol and the ability of most strains to produce phospholipase C. Medium contains Peptone which supply nitrogen. Sodium chloride provides the essential electrolytes in the medium. Agar is a solidifying agent. The medium is made selective by the addition of Polymyxin B which will inhibit Gram-negative bacteria. MYP Agar has proved to be very effective for detection of B. cereus even for a small number.