Cross-sectional studycited by the Tayebat archiveabstract only checked A-CHK-03 standard review

ESBL genes in Dutch chicken meat and people

Extended-spectrum β-lactamase genes of Escherichia coli in chicken meat and humans, The Netherlands.

Overview

Overdevest I et al.. Emerg Infect Dis 2011 · PMID 21762575 · DOI 10.3201/eid1707.110209

Four in five chicken samples had ESBL genes, matching those found in people.

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

Study explained simply

What did the researchers want to find out?: What are prevalence and characteristics of ESBL genes in retail chicken and humans in the Netherlands?
How was the study done?: Cross-sectional study of ESBL genes in retail chicken and human rectal/blood isolates
How many people, animals or samples were studied?: Not stated in abstract; Retail chicken; patients in 4 hospitals
What was actually found?: ESBL genes in 79.8% of chicken meat; predominant genes identical in meat and human rectal swabs; frequently in blood isolates; high similarity of E. coli strains.
How large was the observed effect?: Descriptive
What do the results mean in everyday life?: Resistant bacteria on raw chicken are common in some countries.
What are the study's limitations?: Directionality inferred; Sample sizes not in abstract
What does it say about Elawady's specific claim?: Supports the claim.
Do the results apply to Germany and Europe?: High.
What can explicitly not be concluded from this study?: Cannot prove transmission direction.

Authors: Overdevest I, Willemsen I, Rijnsburger M, Eustace A, Xu L, Hawkey P, Heck M, Savelkoul P, Vandenbroucke-Grauls C, van der Zwaluw K, Huijsdens X, Kluytmans J
Journal: Emerg Infect Dis
Year: 2011
Identifier: PMID 21762575 DOI 10.3201/eid1707.110209 · PMC3381403
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 in record

What are prevalence and characteristics of ESBL genes in retail chicken and humans in the Netherlands?

Study design: Cross-sectional study – Cross-sectional study of ESBL genes in retail chicken and human rectal/blood isolates
Population: Retail chicken; patients in 4 hospitals
Country: Netherlands
Period: Not stated in abstract (published 2011)
Sample size: Not stated in abstract
Inclusion and exclusion criteria: Raw meat samples; fecal carriage surveys

Results: ESBL genes in 79.8% of chicken meat; predominant genes identical in meat and human rectal swabs; frequently in blood isolates; high similarity of E. coli strains.
Absolute risks: not applicable
Authors' conclusion: Abundant ESBL genes in the food chain may affect treatment options.

Descriptive.

Same as A-CHK-02.

High.

Supports overlap.

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

Attribution.

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?: ESBL in chicken and humans.
B. What did the authors find?: 79.8% chicken positive; similar genes.
C. What conclusions do the authors themselves draw?: Possible impact on treatment.
D. What does the archive derive from it?: Supports transmission narrative.
E. Is this derivation scientifically justified?: Justified as supporting evidence of overlap.
Adequacy of the interpretation (by the archive): not applicable