Bacterial growth and subsequent decomposition of food occurs at all temperatures between 4 degrees Centigrade and 60 degrees Centigrade with maximum growth between 30 and 40 degrees Centigrade (80-110 degrees Fahrenheit). Cooked food kept at temperatures between 30-40 degrees Centigrade, allow rapid bacterial growth and decomposition of food. These temperatures are common in kitchens and dining rooms, both in warm & cold countries. This temperature range is also suitable for viruses to thrive. Left over food, stale food and any food eaten many hours after cooking can cause indigestion and flatulence as bacteria, viruses and fungus's like yeast are able to grow and multiply in this food. Their waste products contain toxins and cause these digestive disorders.