Effect of COVID-19 precautions on the gut microbiota and nosocomial infections

Armin Rashidi, Maryam Ebadi, Tauseef Ur Rehman, Heba Elhusseini, Harika Nalluri, Thomas Kaiser, Shernan G. Holtan, Alexander Khoruts, Daniel J. Weisdorf, Christopher Staley

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


COVID-19 precautions decrease social connectedness. It has been proposed that these measures alter the gut microbiota, with potential clinical consequences. We tested this hypothesis in patients with acute myeloid leukemia (AML) receiving inpatient chemotherapy, a population with extensive exposure to the nosocomial setting and at high risk for infections. Hospitalized patients with AML contributed stool samples to a biorepository protocol that was initiated before COVID-19 and continued without change through the pandemic. Patient-, disease-, and treatment-related characteristics remained the same in the two eras and the only change in clinical care was the implementation of COVID-19 precautions in March 2020. The incidence of all-cause nosocomial infections during the pandemic was lower than in the pre-COVID-19 era. Multivariable analysis revealed an imprint of COVID-19 precautions in the gut microbiota as a viable mechanistic explanation. In conclusion, COVID-19 precautions alter the gut microbiota, thereby mediating pathogen susceptibility and nosocomial infections.

Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalGut microbes
Issue number1
StatePublished - 2021

Bibliographical note

Funding Information:
This work was supported by the National Institutes of Health grants KL2TR002492 and UL1TR002494. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

Publisher Copyright:
© 2021 The Author(s). Published with license by Taylor & Francis Group, LLC.


  • Acute myeloid leukemia
  • COVID-19
  • chemotherapy
  • infection
  • microbiota


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