Signs and symptoms of norovirus infection include:
- Abdominal pain or cramps
- Watery or loose diarrhea
- Low-grade fever
- Muscle pain
Signs and symptoms usually begin 24 to 48 hours after first exposure to the virus, and last one to three days. You may continue to shed virus in your feces for up to three days after recovery.
Some people with norovirus infection may show no signs or symptoms. However, they are still contagious and can spread the virus to others.
When to see a doctor
Seek medical attention if you develop diarrhea that doesn't go away within several days. Also call your doctor if you experience severe vomiting, bloody stools, abdominal pain or dehydration.
April 02, 2014
- Treanor JJ. Epidemiology, clinical manifestations and diagnosis of norovirus and related viruses. http://www.uptodate.com/home. Accessed Nov. 8, 2013.
- Blacklow MR. Epidemiology of viral gastroenteritis in adults. http://www.uptodate.com/home. Accessed Nov. 8, 2013.
- Goldman L, et al. Goldman's Cecil Medicine. 24th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.mdconsult.com/das/book/body/191371208-2/0/1492/0.html#. Accessed Nov. 8, 2013.
- Payne DC, et al. Norovirus and medically attended gastroenteritis in U.S. children. The New England Journal of Medicine. 2013;368:1121.
- AskMayoExpert. What tests are needed to confirm the diagnosis of norovirus infection? Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2013.
- Alexandraki I, et al. Management of acute viral gastroenteritis in adults. http://www.uptodate.com/home. Accessed Nov. 8, 2013.
- Bok K, et al. Norovirus gastroenteritis in immunocompromised patients. The New England Journal of Medicine. 2012;367:2126.
- Norovirus: Technical fact sheet. Centers for Disease Control and Prevention. http://www.cdc.gov/norovirus/index.html. Accessed Nov. 8, 2013.
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