B. cereus is responsible for a minority of foodborne illnesses (2–5%), causing severe nausea, vomiting, and diarrhea.[10] Bacillus foodborne illnesses occur due to survival of the bacterial endospores when food is improperly cooked.[11] Cooking temperatures less than or equal to 100 °C (212 °F) allow some B. cereus spores to survive.[12] This problem is compounded when food is then improperly refrigerated, allowing the endospores to germinate.[13] Cooked foods not meant for either immediate consumption or rapid cooling and refrigeration should be kept at temperatures below 10 °C or above 50 °C (50 °F and 122 °F).[12] Germination and growth generally occur between 10 °C and 50 °C,[12] though some strains are psychrotrophic.[14] Bacterial growth results in production of enterotoxins, one of which is highly resistant to heat and acids (pH levels between 2 and 11);[15] ingestion leads to two types of illness, diarrheal and emetic (vomiting) syndrome