The adaptability of B cereus to conditions of stress, such as low pH levels, enhances their survival during passage through the stomach. The initial adaptation of B. cereus to a low pH can take place in its primary habitat, e.g., in soil or raw materials and during the food processing and storage. The acidity of the stomach can reach over pH 4.0 (depending on the quantity and composition of ingested food and the individual properties of a person), thus the level at which vegetative B. cereus cells survive. The less time B. cereus cells spend passing through the stomach, the higher the count of surviving B. cereus cells will be. Therefore, the possibility of the diarrheal type of food poisoning occurring after the ingestion of food containing vegetative B. cereus cells cannot be ruled out.