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Parasites and Protozoans (Giardia, Cryptosporidium)
These tiny organisms are less frequently responsible for intestinal irritation. A person may become infected with one of these by drinking contaminated water. Swimming pools are common places to come in contact with these parasites. Common parasites include
Other Common Causes of Gastroenteritis
Gastroenteritis that is not contagious to others can be caused by chemical toxins, most often found in seafood, food allergies, heavy metals, antibiotics, and other medications.
Medically Reviewed by a Doctor on 2/11/2016
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