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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.
  1. 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 |pmc= value (help). PMID 32253163 Check |pmid= value (help).