(Stomach Flu; Stomach Bug)
by Diane W. Shannon, MD, MPH
Viral gastroenteritis is an infection of the intestines and stomach.
It is caused by one of many viruses. The virus can spread easily through fluids of the mouth and nose. It is passed to surfaces and objects where it can live for hours. People touch the surface with the virus then touch their mouth, nose, or eyes. This is the easiest way for the virus to spread. The virus may also be spread through food or water that has the virus. Some common viruses include:
Children and older adults are more likely to get this infection. It can spread easily in:
The symptoms begin 1 to 2 days after you have contact with the virus. They usually last 1 to 2 days.
Symptoms may include:
You will be asked about your symptoms and past health. A physical exam may be done. The doctor will suspect a virus based in symptoms.
The stool may need to be tested if the illness is severe or not passing. It will help to find the exact cause of the infection.
The infection will pass on its own. Antibiotics are not helpful against a virus. Most will only need home care and rest. It is also important to prevent dehydration. IV fluids may be needed with severe nausea, diarrhea, and vomiting.
The best way to prevent an illness is to avoid the virus. Steps that may help include:
Family Doctor—American Academy of Family Physicians
Centers for Disease Control and Prevention
Norovirus. Centers for Disease Control and Prevention website. Available at: https://www.cdc.gov/norovirus. Accessed September 26, 2020.
Norovirus infection. EBSCO DynaMed website. Available at: http://www.dynamed.com/topics/dmp~AN~T114466/Norovirus-infection . Accessed September 26, 2020.
Rotavirus gastroenteritis. EBSCO DynaMed website. Available at: https://www.dyname... . Accessed September 26, 2020.
Viral gastroenteritis. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: https://www.niddk.nih.gov/health-information/digestive-diseases/viral-gastroenteritis. Accessed September 26, 2020.
Last reviewed September 2020 by EBSCO Medical Review Board
Last Updated: 9/26/2020
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