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It depends on the poison. Sometimes it can be noticed within a few minutes or hours after eating. Other times it might take a day or two to manifest itself inside the body.

If you are actually talking about foodborne agents that cause illness, then it again depends upon what it is. Some illnesses that are caused by eating contaminated food can take days, weeks or even months to show up. See Related Links. And then you usually need lab tests to determine what caused the illness.

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4 to 12 hours

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Q: How long before you feel symptoms of food poisoning?
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Related questions

Could food poisoning result in watery stool?

Yes, I'm in the hospital with my gradmother and she just got over food poisoning a few days before she came in here and that was one of the symptoms of her food poisoning .


How quickly can a child get sick from food poisoning?

The onset of symptoms from food poisoning depending on the cause of the food poisoning. Rotavirus and salmonella may show symptoms beginning in one day, but staphylococcus aureus can have symptoms in as little as 1 hour.


What signs and symptoms are indicative of food poisoning?

The most common symptoms of food poisoning are nausea with or without vomiting, abdominal cramping, diarrhea, and fever. These symptoms can start in as little as a couple hours or can even happen days later.


What symptoms occur with fever?

It depends on the illness you have. If you have food poisoning you will have a fever and if you have the flu you will have a fever but the rest of your symptoms will be different.


what are the symptoms of food poisoning and when do you go to emergency room?

the indicator of food poisoning is "Gastro-Intestinal-Tract disturbance" >> vomiting , sever abdominal pain , constipation , diarrhea


Can food poisoning only develop immediately after contaminated food had been eaten?

No. Some food poisoning may require hours before enough bacteria are present to cause symptoms. In fact, that is typical. Salmonella, one of the most common food poisonings generally does not manifest until 24 hours after ingestion.


How long does ecoli food poisoning last?

The symptoms usually last for about one week


How can you get rid of food poisoning?

Most often, the symptoms of food poisoning will resolve on their own, with hydration and rest being the mainstays of treatment. Occasionally, poisoning caused by germs like bacteria can cause more serious infections with complications that require evaluation by a doctor antibiotic treatment.


What are the physical symptoms of e. coli?

The kind of symptoms that e coli poisoning brings is stomach pain, diarrhea, vomiting, and intense discomfort. E coli is contracted from certain bacterias & is from food poisoning.


Does Nausea and fever mean food poisoning?

It could, but other illnesses have those symptoms, too.


What happens if you get poisoning?

Depends on the type of food poisoning. Different bacteria from different foods, different symptoms. Can range from diarrhea to kidney failure and death.


How long after eating can food poisoning symptoms start?

Food poisoning is a general term that refers to gastrointestinal illnesses (usually diarrhea and/or vomiting) caused by food that is contaminated with bacteria, parasites, viruses, or toxic substances.