Growth ofBacillus cereusin Media Containing Plant Seed Materials and Ingredients Used in Chinese Cookery

摘要

Growth and sporulation of enterotoxigenic strains ofBacillus cereusin media containing 20 different plant seed flours and meals, with and without added infusions of beef, pork, chicken and shrimp, monosodium glutamate (MSG), and soy sauce, were studied. Suspensions (2; pH 7–1) of seed flours and meals from diverse botanical origins were found to be excellent sources of nutrients for growth. No correlations could be made between composition of seed materials and rate of cell division. Mean generation times ofB. cereuscultured in soy, peanut and rice flour media supplemented with animal flesh infusions were significantly faster (P≤ 0.05) than those of respective controls. Monosodium glutamate (1–2) and soy sauce (5–10) stimulated the rate of growth ofB. cereusin rice flour medium. Test flours supporting slower growth rates appeared generally to support higher rates of spor