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Regional spread of an atypical ESBL-producing Escherichia coli ST131H89 clone among different human and environmental reservoirs in Western Switzerland

Martischang R, Seth-Smith H, Verschuuren TD, Héquet D, Gaïa N, François P, Fluit AC, Kluytmans JAJW, Seiffert SN, Tacconelli E, Cherkaoui A, Harbarth S, Egli A, Kohler P.

We describe the inter-regional spread of a novel ESBL-producing Escherichia coli subclone (ST131H89) in long-term care facility residents, general population, and environmental water sources in Western Switzerland between 2017 and 2020. The study highlights the importance of molecular surveillance for tracking emerging antibiotic-resistant pathogens in healthcare and community settings.

Keywords: Escherichia coli; ST131; antimicrobial resistance; long-term care facility; molecular epidemiology; surveillance.

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