Failure to properly Reheat foods. Avoid leaving utensils for wok, grill cooking etc, in sanitized water solution. Avoid using any product that is not properly labeled. Make certain you have a current MSDS sheet for each and every chemical you use. Check staff daily to ensure ill workers do not contaminate products.
Check staffs hands for nicks, cuts etc.
Of all Bacterial Contamination is the greatest threat to the safety of food. Fish Toxins normally found in puffer fish, blowfish, moray eels. Some fish such as Amberjack, Snapper, Barracuda, may eat smaller fish who may have eaten algae that may contain Ciguatoxin. This toxin is normally fatal. Honey from the Mountain Laurel, Milk from cows who have grazed on snakeroot, jellies made from apricot kernels, all can be toxic.