Gastroenteritis - Cause

Do you know what virus, bacteria, or parasite caused your case of gastroenteritis (cruise ship, traveling by plane, traveling to another country, from a family member or friend?)

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What are the most common causes of gastroenteritis?

The most prevalent cause of gastroenteritis in the U.S. and the world is Norovirus. It causes about 50% to 70% of viral gastroenteritis while Rotavirus, Astrovirus, Adenovirus, and Sapovirus strains cause most of the other viral gastroenteritis infections. In 2013, Norovirus was also listed as the leading cause of gastroenteritis in children under 5 years old according to the Centers for Disease Control (CDC).

Bacterial causes of gastroenteritis that occur worldwide are Salmonella, Shigella, Campylobacter Aeromonas, and Escherichia coli (E. coli) strains of bacteria. Other bacteria like Clostridium, Vibrio, Campylobacter, and Yersinia spp can cause outbreaks occasionally.

Parasites such as Giardia, Cryptosporidium, and Entamoeba infections can cause gastroenteritis and occasionally, other parasites have outbreaks such as the Cyclospora outbreak that occurred in 2012 to 2013 in the U.S.

There are many other less frequent causes of gastroenteritis such as food allergies, antibiotics, and toxins. Gastroenteritis symptoms are frequently listed as possible side effects of many medicines.

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