Food-borne illnesses are generally classified as food-borne infections, intoxication or toxin-mediated infection. Infections are caused by eating food that contains living disease-causing organisms. Intoxication is caused by eating food that contains a harmful toxin or chemical produced by bacteria or another source, and toxin-mediated infection is caused by eating a food that contains harmful organisms that will produce a toxin once it has been consumed.
A food-borne hazard can be classified as biological, chemical or physical hazard that can cause illness when it is consumed in food. The main symptoms of food-borne illness are headache, abdominal pain, diarrhea, vomiting, fatigue, fever, nausea, and dehydration.
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