Evidence map›Paper›PMID 39930345›Full record

SynthesisBMC gastroenterology2025

Global prevalence of Fusobacterium nucleatum and Bacteroides fragilis in patients with colorectal cancer: an overview of case reports/case series and meta-analysis of prevalence studies.

Fatemeh Sameni, Parisa Abedi Elkhichi, Ali Dadashi, Mohammad Sadeghi, Mehdi Goudarzi, Maedeh Pourali Eshkalak, Masoud Dadashi

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC gastroenterology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–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

13 citing papers in PubMed.

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  8. New advances in oral microbiology and tumor research.World journal of clinical oncology · 2025
    Review
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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

7 authors.

Fatemeh SameniDepartment of Microbiology, Faculty of Medicine, Shahed University, Tehran, Iran.
Parisa Abedi ElkhichiMedical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Ali DadashiSchool of Pharmacy and Biomedical Sciences, University of Portsmouth, Portsmouth, UK.
Mohammad SadeghiEA7375-EC2M3: Early, Detection of Colonic Cancer by Using Microbial & Molecular Markers,, Paris East Créteil University (UPEC), Créteil, 94010, France.
Mehdi GoudarziDepartment of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Maedeh Pourali EshkalakMedical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Masoud DadashiDepartment of Microbiology, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran. m_d6512@yahoo.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundColorectal cancer (CRC) is the second deadliest carcinoma across the globe and has been known as a multi-factor induced-disease. Emerging research have demonstrated that bacterial colonization may contribute to the initiation and promotion of the CRC. The presence of Fusobacterium nucleatum (F. nucleatum) and Bacteroides fragilis (B. fragilis) in the gut is associated with the development of CRC. In this study, the prevalence of F. nucleatum and B. fragilis among CRC patients has been assessed worldwide through a systematic review and meta-analysis.

methodsThe extensive search was performed using "Fusobacterium nucleatum", "Bacteroides fragilis", "Colorectal cancer" and all relevant keywords. Then, a systematic paper screening was done following a comprehensive search in Embase, Web of Science, and PubMed databases while the time range was limited between the years 2000 and 2024. Afterwards, statistical analysis was performed utilizing the comprehensive meta-analysis (CMA) software (version 2.0, Biostat, USA).

resultsAccording to the meta-analysis of prevalence studies, the prevalence of F. nucleatum among 19 countries and B. fragilis among 10 countries were indicated to be 38.9% (95% CI 33.7-44.3%) and 42.5% (95% CI 34.4-51.1%), respectively, among the CRC patients. It was then revealed that Asia had the highest prevalence of F. nucleatum while most of the B. fragilis isolates in CRC cases were reported in European countries. Moreover, the data suggested that the most common comorbidity observed among the CRC cases was diabetes.

conclusionOur results emphasized the high prevalence of F. nucleatum and B. fragilis in CRC patients. Based on this meta-analysis review, regulating the gut microbiota in CRC patients seemed to be a promising approach to improving the efficacy of CRC therapy.

Indexed as

Bacteroides fragilisBacteroides InfectionsColorectal NeoplasmsFusobacterium InfectionsFusobacterium nucleatumGastrointestinal MicrobiomeGlobal HealthHumansPrevalenceBacteroides fragilisColorectal cancerFusobacterium nucleatumMeta-analysis

Identifiers

PMID39930345
PMCPMC11808969

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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.