Evidence map›Paper›PMID 25270732›Full record

Observational studyBMC infectious diseases2014

High colonization rates of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli in Swiss travellers to South Asia- a prospective observational multicentre cohort study looking at epidemiology, microbiology and risk factors.

Esther Kuenzli, Veronika K Jaeger, Reno Frei, Andreas Neumayr, Susan DeCrom, Sabine Haller, Johannes Blum, Andreas F Widmer, Hansjakob Furrer, Manuel Battegay and 2 more

Registry-linked trialAbstract readMulticenter StudyObservational Study
In one paragraph

Observational study in BMC infectious diseases, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03306407 (A Multicentre Intervention Study on the Use of Hand Sanitizers in the Prevention of Intestinal Colonization With Extended-spectrum Beta-lactamase-producing Enterobacteriaceae in Travellers to the Indian Subcontinent), which is not on this map. Cited by 61 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed, 4 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.

NCT03306407 nacompletednot on this mapstarted 2015, after this paper: background citation

A Multicentre Intervention Study on the Use of Hand Sanitizers in the Prevention of Intestinal Colonization With Extended-spectrum Beta-lactamase-producing Enterobacteriaceae in Travellers to the Indian Subcontinent

TypeinterventionalSponsorChristoph HatzRan2015 to 2018Enrolled290ConditionsDrug Resistance, Multiple, Travel MedicineArmsImproved hand hygiene
3 · Its place in the literature

Who cites it

61 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  12. Epidemiology and risk factors of expatriates returning to Switzerland colonized at the intestinal level with multidrug-resistant Enterobacterales.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2025
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  13. Review
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  15. High risk of intestinal colonization with ESBL-producing Escherichia coli among soldiers of military contingents in specific geographic regions.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2023
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1 more citing papers are in PubMed but not listed here.

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

12 authors.

Esther KuenzliDivision for Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Basel, Switzerland. esther.kuenzli@usb.ch.
Veronika K Jaeger
Reno Frei
Andreas Neumayr
Susan DeCrom
Sabine Haller
Johannes Blum
Andreas F Widmer
Hansjakob Furrer
Manuel Battegay
Andrea Endimiani
Christoph Hatz

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInternational travel contributes to the worldwide spread of multidrug resistant Gram-negative bacteria. Rates of travel-related faecal colonization with extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae vary for different destinations. Especially travellers returning from the Indian subcontinent show high colonization rates. So far, nothing is known about region-specific risk factors for becoming colonized.

methodsAn observational prospective multicentre cohort study investigated travellers to South Asia. Before and after travelling, rectal swabs were screened for third-generation cephalosporin- and carbapenem-resistant Enterobacteriaceae. Participants completed questionnaires to identify risk factors for becoming colonized. Covariates were assessed univariately, followed by a multivariate regression.

resultsHundred and seventy persons were enrolled, the largest data set on travellers to the Indian subcontinent so far. The acquired colonization rate with ESBL-producing Escherichia coli overall was 69.4% (95% CI 62.1-75.9%), being highest in travellers returning from India (86.8%; 95% CI 78.5-95.0%) and lowest in travellers returning from Sri Lanka (34.7%; 95% CI 22.9-48.7%). Associated risk factors were travel destination, length of stay, visiting friends and relatives, and eating ice cream and pastry.

conclusionsHigh colonization rates with ESBL-producing Enterobacteriaceae were found in travellers returning from South Asia. Though risk factors were identified, a more common source, i.e. environmental, appears to better explain the high colonization rates.

Indexed as

AdolescentAdultAgedAsiabeta-LactamasesChildChild, PreschoolCohort StudiesEnterobacteriaceaeEnterobacteriaceae InfectionsEscherichia coliEscherichia coli InfectionsEscherichia coli ProteinsFecesFemaleHumansbeta-LactamasesEscherichia coli Proteins

Identifiers

PMID25270732
PMCPMC4262238

What OpenQuestion holds

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Registered trials

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.