Gastrointestinal symptoms of long COVID-19 related to the ectopic colonization of specific bacteria that move between the upper and lower alimentary tract and alterations in serum metabolites.

BMC Med · 2023 · PMC10355065 · PMID 37468867

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a decreasing trendno p-value reported

Second, the comparison of metagenome data obtained from fecal samples between patients during hospitalization or at follow-up and healthy controls revealed that α-diversity had a decreasing trend and that there was a significant discrepancy in β-diversity in patients with GI long COVID-19 symptoms.

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