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If you have norovirus illness, you can feel extremely ill and throw up or have diarrhea many times a day. This can lead to [[dehydration]], especially in young children, older adults, and people with other illnesses. Most people with norovirus illness get better within 1 to 3 days. Symptoms of dehydration include:
If you have norovirus illness, you can feel extremely ill and throw up or have diarrhea many times a day. This can lead to [[dehydration]], especially in young children, older adults, and people with other illnesses. Most people with norovirus illness get better within 1 to 3 days. Symptoms of dehydration include:

Revision as of 16:46, 20 November 2012

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Overview

The incubation period for norovirus-associated gastroenteritis in humans is usually between 24 and 48 hours (median in outbreaks 33 to 36 hours), but cases can occur within 12 hours of exposure. Norovirus infection usually presents as acute-onset vomiting, watery non-bloody diarrhea with abdominal cramps, and nausea. Low-grade fever also occasionally occurs, and vomiting is more common in children. Dehydration is the most common complication, especially among the young and elderly, and may require medical attention. Symptoms usually last 24 to 60 hours. Recovery is usually complete and there is no evidence of any serious long-term sequelae. Studies with volunteers given stool filtrates have shown that asymptomatic infection may occur in as many as 30% of infections, although the role of asymptomatic infection in norovirus transmission is not well understood.

History and Symptoms

Norovirus causes inflammation of the stomach or intestines or both. This is called acute gastroenteritis. The most common symptoms of norovirus infection include:

Other symptoms include:

If you have norovirus illness, you can feel extremely ill and throw up or have diarrhea many times a day. This can lead to dehydration, especially in young children, older adults, and people with other illnesses. Most people with norovirus illness get better within 1 to 3 days. Symptoms of dehydration include:

  • Decrease in urination
  • Dry mouth and throat
  • Feeling dizzy when standing up
  • Crying with few or no tears, sleepiness, and fussiness in children

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