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Avoid scombroid fish poisoning by keeping fish refrigerated from the time it's caught until it's cooked and eaten. Avoid eating large fish, at or near the top of the food chain, as they are most likely to cause ciguatera poisoning.

While symptoms of a stomach virus can take days to develop, food poisoning symptoms can occur within 6 hours of eating. People may experience diarrhea, nausea, vomiting, stomach pain and cramps, or a fever. Sickness from food poisoning can last from a few hours to several days, but most cases clear up within a day.

Typically, food poisoning symptoms will occur several hours after eating contaminated food, but in some instances they can develop up to a week later or more. While most cases of food poisoning resolve in two to four days, some instances can last for weeks or even months.

Ice chips and water. Liquid intake is crucial in helping your body fight off food poisoning. Vomiting and diarrhea can cause dehydration, so sucking on ice chips or taking small sips of water is a good starting point. Sports drinks that contain electrolytes are the best way to prevent dehydration during this time.

Some people may also have nausea, vomiting, and diarrhea, although these symptoms are much less common. Neurotoxic shellfish poisoning: The symptoms are very similar to Ciguatera poisoning. After eating contaminated clams or mussels, you will most likely experience nausea, vomiting, and diarrhea.

Infectious organisms or their toxins can contaminate food at any point of processing or production. Contamination can also occur at home if food is incorrectly handled or cooked. Food poisoning symptoms, which can start within hours of eating contaminated food, often include nausea, vomiting or diarrhea.