Poisoning occurs as a result of eating foods contaminated with microbes or their toxins (salmonella, staphylococcus, botulinum toxin). Symptoms of poisoning • headache, dizziness, • general weakness, • nausea, • vomit, • abdominal pain; • diarrhea, • thirst, • breathing problems up to the point of stopping. First aid for food poisoning • provided as for oral poisoning; • call an ambulance.