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Symptoms
By Mayo Clinic staffFood poisoning symptoms vary with the source of contamination. Most types of food poisoning cause one or more of the following signs and symptoms:
- Nausea
- Vomiting
- Watery diarrhea
- Abdominal pain
- Stomach cramps
- Loss of appetite
- Fatigue
- Fever
Signs and symptoms may start within hours after eating the contaminated food, or they may begin days later. Sickness caused by food poisoning generally lasts from one to 10 days.
When to see a doctor
If you experience any of the following signs or symptoms, seek medical attention.
- Frequent episodes of vomiting for more than two days
- Vomiting blood
- Inability to keep liquids down for 24 hours
- Severe diarrhea for more than three days
- Blood in your bowel movements
- Extreme pain or severe abdominal cramping
- An oral temperature higher than 101.5 F (38.6 C)
- Signs or symptoms of dehydration — excessive thirst, dry mouth, little or no urination, severe weakness, dizziness or lightheadedness
If you suspect food poisoning, contact your local health department. Your report can help the health department identify a potential outbreak and may help prevent other people from getting sick. Besides listing your symptoms, you may need to recall what you ate, where you got the food and when you got sick.
- Diagnosis and management of foodborne illnesses: A primer for physicians and other health care professionals. Rockville, Md.: Agency for Healthcare Research and Quality. http://www.guideline.gov/summary/summary.aspx?ss=15&doc_id=5266&nbr=3593. Accessed April 20, 2009.
- Bacteria and foodborne illness. National Digestive Diseases Information Clearinghouse (NDDIC). http://www.digestive.niddk.nih.gov/ddiseases/pubs/bacteria/index.htm. Accessed April 20, 2009.
- Foodborne illness. Centers for Disease Control and Prevention. http://www.cdc.gov/ncidod/dbmd/diseaseinfo/foodborneinfections_g.htm. Accessed April 20, 2009.
- Basics for handling food safely. United States Department of Agriculture Food Safety and Inspection Service. http://www.fsis.usda.gov/PDF/Basics_for_Safe_Food_Handling.pdf. Accessed April 20, 2009.
- Centers for Disease Control and Prevention, et al. Diagnosis and management of foodborne illnesses: A primer for physicians and other health care professionals. MMWR Recommendations and Reports. 2004;53:1. http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5304a1.htm. Accessed April 20, 2009.
- Avoid foodborne illness: Fight BAC! American Medical Association. http://www.ama-assn.org/ama/upload/mm/36/foodborne_patient.pdf. Accessed April 20, 2009.
- Listeriosis. Centers for Disease Control and Prevention Division of Foodborne, Bacterial and Mycotic Diseases. http://www.cdc.gov/nczved/dfbmd/disease_listing/listeriosis_gi.html. Accessed April 20, 2009.
- Conlon CP. Food-borne and water-borne infections. In: Cohen J, et al. Infectious Diseases. 2nd ed. New York, N.Y.: Mosby; 2004. http://www.mdconsult.com/das/book/body/132803244-4/0/1209/288.html?tocnode=49354199&fromURL=288.html#4-u1.0-B0-323-02407-6..50095-7_3004. Accessed April 21, 2009.
