Evidence map›Paper›PMID 34611216›Full record

ArticleScientific reports2021

Lung microbiome of stable and exacerbated COPD patients in Tshwane, South Africa.

T Goolam Mahomed, R P H Peters, M Allam, A Ismail, S Mtshali, A Goolam Mahomed, V Ueckermann, M M Kock, M M Ehlers

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 9% of its field
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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 citations in OpenAlex.

  1. Pooled it
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  8. The respiratory tract virome: unravelling the role of viral dark matter in respiratory health and disease.European respiratory review : an official journal of the European Respiratory Society · 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

9 authors at 2 institutions in 1 country.

T Goolam MahomedDepartment of Medical Microbiology, University of Pretoria, Pretoria, South Africa.
R P H PetersDepartment of Medical Microbiology, University of Pretoria, Pretoria, South Africa.
M AllamNational Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.
A IsmailNational Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.
S MtshaliNational Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg, South Africa.
A Goolam MahomedLouis Pasteur Private Hospital, Pretoria, South Africa.
V UeckermannDepartment of Internal Medicine, University of Pretoria, Pretoria, South Africa.
M M KockDepartment of Medical Microbiology, University of Pretoria, Pretoria, South Africa.
M M EhlersDepartment of Medical Microbiology, University of Pretoria, Pretoria, South Africa. marthie.ehlers@up.ac.za.
University of Pretoria · ZANational Health Laboratory Service · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Chronic obstructive pulmonary disease (COPD) is characterised by the occurrence of exacerbations triggered by infections. The aim of this study was to determine the composition of the lung microbiome and lung virome in patients with COPD in an African setting and to compare their composition between the stable and exacerbated states. Twenty-four adult COPD patients were recruited from three hospitals. Sputum was collected and bacterial DNA was extracted. Targeted metagenomics was performed to determine the microbiome composition. Viral DNA and RNA were extracted from selected samples followed by cDNA conversion. Shotgun metagenomics sequencing was performed on pooled DNA and RNA. The most abundant phyla across all samples were Firmicutes and Proteobacteria. The following genera were most prevalent: Haemophilus and Streptococcus. There were no considerable differences for alpha and beta diversity measures between the disease states. However, a difference in the abundances between disease states was observed for: (i) Serratia (3% lower abundance in exacerbated state), (ii) Granulicatella (2.2% higher abundance in exacerbated state), (iii) Haemophilus (5.7% higher abundance in exacerbated state) and (iv) Veillonella (2.5% higher abundance in exacerbated state). Virome analysis showed a high abundance of the BeAn 58058 virus, a member of the Poxviridae family, in all six samples (90% to 94%). This study is among the first to report lung microbiome composition in COPD patients from Africa. In this small sample set, no differences in alpha or beta diversity between stable and exacerbated disease state was observed, but an unexpectedly high frequency of BeAn 58058 virus was observed. These observations highlight the need for further research of the lung microbiome of COPD patients in African settings.

Indexed as

MicrobiotaAgedBiodiversityDisease ProgressionFemaleHumansLungMaleMetagenomeMetagenomicsMiddle AgedPulmonary Disease, Chronic ObstructiveRisk FactorsSouth AfricaSputum

Identifiers

PMID34611216
PMCPMC8492659
OpenAlexW3203937470

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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 OpenQuestion graph.