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Persistent diarrhea can be caused by several possibilities.
Diarrhea can be caused by the viral infection commonly.
However, bacterial and parasitic infection can cause similar symptoms as well.
Course of antibiotics will be helpful after the stool tests.
Small intestinal bacterial overgrowth can cause chronic diarrhea. This often responds well to the antibiotics. Rifaximin is commonly used as it is absorbed poorly avoiding systemic side effects. Another possibility can be the eosinophilic gastroenteritis due to the eosinophilic infiltration of the lining. This is a challenging diagnosis --often requires full thickness small intestinal biopsy. The treatment requires elimination diet principle. Your diet needs to be free of lactose, gluten etc.Inflammatory bowel disease like Crohn's disease is another possibility. Sometimes, colon or intestinal polyps can cause secretory diarrhea. Please consult with a gastroenterologist for further evaluation.
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