Cross-sectional studycited by the Tayebat archiveabstract only checked A-CHK-19 standard review

Urinary infection E. coli genes in Danish chicken and pork

Broiler chickens, broiler chicken meat, pigs and pork as sources of ExPEC related virulence genes and resistance in Escherichia coli isolates from community-dwelling humans and UTI patients.

Overview

Jakobsen L et al.. Int J Food Microbiol 2010 · PMID 20656368 · DOI 10.1016/j.ijfoodmicro.2010.06.025

E. coli from meat had virulence genes similar to those from patients with urinary infections.

Does the study support the specific claim? Yes · Methodological quality: moderate

Original publication

Plain-language summary

Study explained simply

What did the researchers want to find out?: Could broiler meat and pork be sources of ExPEC strains in humans?
How was the study done?: Molecular comparison of ExPEC virulence genes in E. coli from UTI patients, community humans, meat and animals
How many people, animals or samples were studied?: 964 isolates; 964 E. coli isolates
What was actually found?: Seven of eight ExPEC-related genes detected in isolates from broiler meat, broilers, pork and pigs; strong similarities between human and meat/animal isolate profiles.
How large was the observed effect?: PCR; cluster analysis
What do the results mean in everyday life?: Meat could be one source of bacteria causing urinary infections.
What are the study's limitations?: Gene presence, not transmission proof
What does it say about Elawady's specific claim?: Supports plausibility.
Do the results apply to Germany and Europe?: High.
What can explicitly not be concluded from this study?: Cannot prove transmission.

Scientific in-depth review

1. Full reference

Authors: Jakobsen L, Spangholm DJ, Pedersen K, Jensen LB, Emborg HD, Agersø Y, Aarestrup FM, Hammerum AM, Frimodt-Møller N
Journal: Int J Food Microbiol
Year: 2010
Identifier: PMID 20656368 DOI 10.1016/j.ijfoodmicro.2010.06.025
Verification: verified – PubMed E-utilities efetch, 2026-10-25
Retracted: no
Corrections: none
Extent checked: abstract only
Conflicts of interest and funding: No COI statement

2. Research question

Could broiler meat and pork be sources of ExPEC strains in humans?

3. Study design and population

Study design: Cross-sectional study – Molecular comparison of ExPEC virulence genes in E. coli from UTI patients, community humans, meat and animals
Population: 964 E. coli isolates
Country: Denmark
Period: Not stated
Sample size: 964 isolates
Inclusion and exclusion criteria: Geographically and temporally matched isolates

4. Methods and endpoints

Exposure / intervention: Source (meat/animal)
Comparator: Human isolates
Endpoints: ExPEC virulence genes; cluster similarity
Statistical methods: PCR; cluster analysis

5. Actual results

Results: Seven of eight ExPEC-related genes detected in isolates from broiler meat, broilers, pork and pigs; strong similarities between human and meat/animal isolate profiles.
Absolute risks: not applicable
Authors' conclusion: Meat and production animals may pose a zoonotic risk.

6. Strengths

Matched isolates

7. Weaknesses

Gene presence, not transmission proof

8. Risk of bias

Orienting tool: none applicable
Type of assessment: simplified assessment (abstract only)
Full formal assessment: no
Overall risk of bias: some concerns
Rationale: Inference from similarity.

9. Assessment of the statistical interpretation

Descriptive.

10. Relevance to the specific claim

C-CHK-05.

11. Independent contrary findings

None.

12. Transferability to Germany and Europe

High.

13. Overall methodological judgement

Supports plausibility.

Multidimensional assessment
Multidimensional assessment
Authenticity of the source	verified
Methodological quality	moderate
Risk of bias	some concerns
Precision of results	not applicable
Directness	indirect
Reproducibility	partly replicated
Consistency with the overall evidence	consistent
Regional transferability	high
Adequacy of the interpretation (by the archive)	not applicable

14. Open questions

Attribution.

15. Linked fact checks

Industrial chicken is raised with routine antibiotics, and antibiotic-resistant bacteria (e.g., ESBL E. coli, MRSA, resistant Campylobacter, mcr-1) spread from poultry to humans via the food chain. – Studies supporting the claim

Use by the Tayebat archive

Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.

What the archive says about the study: Listed in bibliography (no interpretation).
A. What was actually studied?: ExPEC genes in meat and humans.
B. What did the authors find?: Shared virulence/resistance profiles.
C. What conclusions do the authors themselves draw?: Possible zoonotic risk.
D. What does the archive derive from it?: Supports transmission narrative.
E. Is this derivation scientifically justified?: Justified as plausibility evidence.
Adequacy of the interpretation (by the archive): not applicable