Evidence map›Paper›PMID 36376804›Full record

SynthesisBMC microbiology2022

Meta-analysis of 16S rRNA microbial data identified alterations of the gut microbiota in COVID-19 patients during the acute and recovery phases.

Xiaomin Cheng, Yali Zhang, Yifan Li, Qin Wu, Jiani Wu, Soo-Kyung Park, Cheng Guo, Jiahai Lu

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in BMC microbiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  3. Review
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  5. Microbiome-Metabolome Crosstalk as a Driver of COVID-19 Severity.Medical sciences (Basel, Switzerland) · 2026
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  8. Microbiome and Long COVID-19: Current Evidence and Insights.International journal of molecular sciences · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Xiaomin Cheng *School of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China.
Yali Zhang *School of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China.
Yifan LiSchool of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China.
Qin WuSchool of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China.
Jiani WuSchool of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China.
Soo-Kyung ParkDivision of Gastroenterology, Department of Internal Medicine and Inflammatory Bowel Disease Center, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
Cheng GuoCenter for Infection and Immunity, Mailman School of Public Health, Columbia University, New York, NY, 10032, USA. cg2984@cumc.columbia.edu.
Jiahai LuSchool of Public Health, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China. lujiahai@mail.sysu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDozens of studies have demonstrated gut dysbiosis in COVID-19 patients during the acute and recovery phases. However, a consensus on the specific COVID-19 associated bacteria is missing. In this study, we performed a meta-analysis to explore whether robust and reproducible alterations in the gut microbiota of COVID-19 patients exist across different populations.

methodsA systematic review was conducted for studies published prior to May 2022 in electronic databases. After review, we included 16 studies that comparing the gut microbiota in COVID-19 patients to those of controls. The 16S rRNA sequence data of these studies were then re-analyzed using a standardized workflow and synthesized by meta-analysis.

resultsWe found that gut bacterial diversity of COVID-19 patients in both the acute and recovery phases was consistently lower than non-COVID-19 individuals. Microbial differential abundance analysis showed depletion of anti-inflammatory butyrate-producing bacteria and enrichment of taxa with pro-inflammatory properties in COVID-19 patients during the acute phase compared to non-COVID-19 individuals. Analysis of microbial communities showed that the gut microbiota of COVID-19 recovered patients were still in unhealthy ecostates.

conclusionsOur results provided a comprehensive synthesis to better understand gut microbial perturbations associated with COVID-19 and identified underlying biomarkers for microbiome-based diagnostics and therapeutics.

Indexed as

COVID-19Gastrointestinal MicrobiomeBacteriaDysbiosisFecesHumansRNA, Ribosomal, 16SRNA, Ribosomal, 16S16S rRNAAcute phaseCOVID-19Gut microbiotaRecovery phase

Identifiers

PMID36376804
PMCPMC9662111

What Socratic holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.