Food Poisoning

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Food poisoning facts

  • Food poisoning is a common infection that affects millions of people in the United States each year.
  • Most commonly, patients complain of vomiting, diarrhea, and crampy abdominal pain.
  • People should seek medical care if they have an associated fever, blood in their stool, signs and symptoms of dehydration, or if their symptoms do not resolve after a couple of days.
  • Treatment focuses on keeping the patient well hydrated.
  • Most cases of food poisoning resolve on their own.
  • Prevention is key and depends upon keeping food preparation areas clean, good hand washing, and cooking foods thoroughly.

What is food poisoning?

Food poisoning might be described as a food borne disease. Food that contains a toxin, chemical or infectious agent (like a bacterium, virus, parasite, or prion) and cause symptoms in the body are considered types of food poisoning by most investigators. Those symptoms may be related only to the gastrointestinal tract causing vomiting or diarrhea or may involve other organs such as the kidney, brain or muscle.

Typically most food borne diseases cause vomiting and diarrhea that tend to be short lived and resolve on their own, but dehydration and electrolyte abnormalities may develop. According to the Center for Disease Control and Prevention, 76 million people become ill from food related diseases each year resulting in 325,000 hospitalizations and 5,000 deaths.

Reviewed by Charles Patrick Davis, MD, PhD on 10/18/2011


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Food Poisoning - Causes Question: Do you know what caused your food poisoning?
Food Poisoning - Experience Question: Please describe your experience with food poisoning.
Food Poisoning - Home Remedies Question: What home remedies have you used when you experienced food poisoning?
Food Poisoning - Treatment Question: What was your treatment experience with food poisoning?
Food Poisoning - Symptoms Question: What were the symptoms of your food poisoning?

Food Poisoning Symptoms

What Are Symptoms of Food Poisoning?

Viewer Question: Is it necessary to conduct a culture of feces or vomit in order to determine that a patient suffers from food poisoning?

Doctor's Response: 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.

The actual cause of most individual episodes of food poisoning, however, never is pursued (for example, a culture is not done) since most episodes are mild or moderate in severity and are over in a few hours to a few days. In fact, the diagnosis of food poisoning usually is made only presumptively, based on the affected individual's symptoms and the circumstances. Even in outbreaks of suspected food poisoning that involve many people, when careful studies are done, a specific cause is found no more than half of the time.

Bacteria are the cause of most outbreaks of food poisoning for which a specific cause is determined. Bacteria cause food poisoning in three ways.

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