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Can SARS-CoV-2 be transmitted via faeces?

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CURRENT OPINION IN GASTROENTEROLOGY
卷 38, 期 1, 页码 26-29

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LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MOG.0000000000000794

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COVID-19; faecal transmission; gastrointestinal symptoms; gut microbiota; SARS-CoV-2

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This article discusses the correlation between gastrointestinal symptoms, such as diarrhea, and the presence of SARS-CoV-2 RNA in feces. It suggests that fecal shedding of the virus can occur independently of gastrointestinal symptoms. Additionally, COVID-19 can impact the balance of gut microbiota, leading to inflammation and potentially facilitating disease transmission.
Purpose of review COVID-19 patients can present gastrointestinal symptoms, being diarrhoea one of the most frequent, suggesting intestinal health can be impacted by COVID-19. Here, we will discuss whether there is a correlation between the presence of SARS-CoV-2 RNA in faeces and diarrhoea, the relevance of gastrointestinal symptoms in disease diagnosis and transmission, and how COVID-19 can impact the gut microbial balance. Recent findings SARS-CoV-2 RNA has been reported in faeces or rectal swabs of COVID-19 patients with and without diarrhoea, suggesting faecal shedding can occur independently of gastrointestinal symptoms. However, the presence of the virus in the intestine can persist beyond its presence in the respiratory tract, with some reports suggesting that SARS-CoV-2 in the faeces can be infectious. COVID-19 can impact the gut microbiota causing an enhancement of biosynthesis pathways that favour the expansion of bacterial pathogens in the inflamed gut, and causing a decline in commensals involved in the human immune response. Gastrointestinal symptoms may be the first indication of COVID-19. SARS-CoV-2 in faeces can potentiate routes of disease transmission, particularly as the high viral loads reported in patients with severe illness suggest virus replication in the intestine may be possible.

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