Thorough washing and proper cooking of fruits and vegetables can eliminate most bacteria that cause food poisoning. Food-borne illnesses or food poisoning usually occurs by eating food that is contaminated with bacteria or their toxins. Virus and parasites can also cause food poisoning. People have long known that raw meat, poultry and eggs can also harbor disease–causing microbes. But in recent years, most outbreaks of food–borne illnesses have been due to fresh fruits and vegetables. Food poisoning can cause abdominal pain, nausea, headache, fatigue, vomiting, diarrhea and dehydration. Symptoms may appear several hours to several days after eating tainted food. For example, Salmonella bacteria will cause illness 12 hours to 3 days after ingestion and last for about 4–7 days. The most common way to treat food poisoning is to drink plenty of fluids. The sickness usually subsides within a few days.