Norovirus Topic Guide
Norovirus: Infection with norovirus causes symptoms like vomiting, nausea, diarrhea, and abdominal cramping. Symptoms and signs usually begin within 12-48 hours after initial contact with the virus. The infection is self-limiting, so medical treatment is usually unnecessary. However, if the infected individual is unable to rehydrate, it may be necessary to seek medical care to avoid dehydration.
Gastroenteritis (Stomach Flu) Gastroenteritis (stomach flu) is most commonly caused by viruses and bacteria like rotavirus, adenovirus, parvovirus, and astrovirus. Bacteria causing gastroenteritis include Staphylococcus aureus, E. coli, salmonella, shigella, and Campylobacter, and C difficile. Other causes may be due to chemical toxins. Treatment of gastroenteritis depends upon the cause.
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