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Diarrhea is an uncommon gastrointestinal symptom in patients with COVID-19, but in may be the presenting symptom in few patients. The frequency of occurrence of diarrhea varies between 1%-35%. [1]It varies widely between different studies probably due to the different criteria used to define diarrhea.
- SARS-CoV-2 uses the ACE2 receptors for cell entry. These receptors are presently abundantly not only in the lungs but also in the enterocytes of the small intestinal.
- Entry of the virus causes disruption of the enterocytes and may lead to inflammation.
- ↑ Li XY, Dai WJ, Wu SN, Yang XZ, Wang HG (2020). "The occurrence of diarrhea in COVID-19 patients". Clin Res Hepatol Gastroenterol. doi:10.1016/j.clinre.2020.03.017. PMC 7270575 Check
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