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Characterization of Fecal Extended-Spectrum-β-Lactamase-Producing Escherichia coli in a Remote Community during a Long Time Period

Abstract : Carriage of extended-spectrum beta-lactamase-producing enterobacteria (ESBL-E) has increased in community settings. Little is known about their long-term evolution. French Guiana Amerindians living in a very remote village, already sampled in 2001 and 2006 for ESBL-E fecal carriage, were screened again in October 2010. Sociodemographic data and antibiotic intake data were collected during the previous year. ESBL-E strains collected in 2010 and their plasmid contents were typed. The results were compared to those of the previous campaigns. The prevalence of ESBL-E carriage in 2010 was 5.3%, whereas it was 8.0% and 3.2% in 2006 and 2001, respectively. As previously determined, no individual factor was associated with carriage, including personal antibiotic exposure. However, overall antibiotic use had decreased to a 0.67 treatments/subject/year in 2010 versus 1.09 in 2006 (P < 0.001), which supports the idea that population exposure to antibiotics impacts on ESBL-E community carriage rates. A wide diversity of ESBL Escherichia coli strains belonging to the A0, A1, B1, and D2 phylogroups and producing the CTX-M-1, CTX-M-2, and CTX-M-8 enzymes were isolated. Despite the overall genetic diversity of the strains evaluated by repetitive extragenic palindromic PCR (rep-PCR) and multilocus sequence typing, two CTX-M-1-producing clones were found to have spread. In contrast, similar ESBL-bearing I1/Iγ plasmids were present in various strains both within and between carriers, suggesting high rates of plasmid transfer. Our results suggest that overall antibiotic exposure affects ESBL-E fecal carriage in the community. ESBL-E spread may be the result of both strain dissemination and the transfer of plasmids in intestinal microbiota.
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Contributeur : Nathalie Salvy-Córdoba Connectez-vous pour contacter le contributeur
Soumis le : mardi 22 septembre 2020 - 17:26:47
Dernière modification le : lundi 28 novembre 2022 - 10:38:07

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Paul-Louis Woerther, Cécile Angebault, Hervé Jacquier, Olivier Clermont, Assyia El Mniai, et al.. Characterization of Fecal Extended-Spectrum-β-Lactamase-Producing Escherichia coli in a Remote Community during a Long Time Period. Antimicrobial Agents and Chemotherapy, 2013, 57 (10), pp.5060-5066. ⟨10.1128/AAC.00848-13⟩. ⟨hal-02945987⟩



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