An intoxication results when a person eats food containing toxins that cause illness. Toxins are produced by harmful microorganisms, the result of a chemical contamination, or are naturally part of a plant or seafood.Some bacteria cause an intoxication. Viruses and parasites do not cause foodborne intoxication.The foodborne bacteria that cause intoxication are: Clostridium botulinum, Staphylococcus aureus, Clostridium perfringens, and Bacillus cereus.ome bacteria cause an intoxication. Viruses and parasites do not cause foodborne intoxication. The foodborne bacteria that cause intoxication are: Clostridium botulinum, Staphylococcus aureus, Clostridium perfringens, and Bacillus cereus.