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Causes of Bacillus cereus type II food poisoning. Primary Cause of Bacillus cereus type II food poisoning. at any time, from exposure to toxins, poisons, environmental, or other substances.
Calculate MPN of B. cereus cells/g of sample (see BAM Appendix 2) based on the number of tubes at each dilution in which the presence of B. cereus was confirmed. Biochemical testing will be necessary to delineate to the species level, however, enterotoxins can be carried by Bacillus spp. other than B. cereus.. cereus food poisoning may occur when foods are prepared and held without adequate refrigeration for several hours before serving, with B. cereus 6 cells/g. Foods incriminated in past outbreaks include cooked meat and vegetables, boiled or fried rice, vanilla sauce, custards, soups, and raw vegetable sprouts.