Occurrence of colistin-resistant Escherichia coli in yellow-legged seagulls (Larus michahellis) from Central Italy.

Fabrizio Bertelloni, Giulia Cagnoli, Alessia Di Paolo, Valentina Virginia Ebani

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Article in Veterinary research communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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4 · The record

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5 · Who and what money

Authors and funding

4 authors.

Fabrizio Bertelloni *Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, Pisa, 56124, Italy.

Giulia Cagnoli *Department of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, Pisa, 56124, Italy.

Alessia Di PaoloDepartment of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, Pisa, 56124, Italy.

Valentina Virginia EbaniDepartment of Veterinary Sciences, University of Pisa, Viale delle Piagge 2, Pisa, 56124, Italy. valentina.virginia.ebani@unipi.it.

Funding

Università di Pisa Fondi Ateneo 2022

6 · The paper itself

Abstract

Colistin is a last-resort drug useful in the treatment of infections caused by multidrug-resistant Enterobacteriaceae. However, colistin-resistant bacterial strains may occur in human and veterinary medicine. The present survey investigated the occurrence and dissemination of colistin-resistant Escherichia coli among yellow-legged seagulls (Larus michahellis). A total of 218 E. coli strains, previously isolated from feces of yellow-legged seagulls, were submitted to the broth microdilution test to assess colistin minimum inhibition concentration (MIC) and the isolates that were resistant were analyzed through PCR to detect mobile colistin resistance genes (mcr1 - mcr9). Four (1.83%) isolates were colistin-resistant: one strain with MIC of 4 µg/mL, 3 strains with MIC > 256 µg/mL. The nine investigated mcr genes were not detected in any tested strain. The detection of colistin-resistant E. coli, even though with low prevalence, suggested that seagulls may contribute to the spreading of bacteria resistant to this antimicrobial. Monitoring wild birds is a useful tool for assessing the spread of new antimicrobial resistance.

Indexed as

Anti-Bacterial AgentsBird DiseasesColistinDrug Resistance, BacterialEscherichia coliEscherichia coli InfectionsAnimalsFecesItalyMicrobial Sensitivity TestsAnti-Bacterial AgentsColistinColistin resistanceEscherichia coliLarus michahellisOne HealthSeagulls

Identifiers

PMID42340532

DOI10.1007/s11259-026-11373-3

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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.