{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T14:40:20Z","timestamp":1790692820408,"version":"4.1.0"},"reference-count":25,"publisher":"American Society for Microbiology","issue":"11","license":[{"start":{"date-parts":[[2012,11,1]],"date-time":"2012-11-01T00:00:00Z","timestamp":1351728000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["Antimicrob Agents Chemother"],"published-print":{"date-parts":[[2012,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            A multicenter survey, carried out in 2010 in Argentina, showed an increased prevalence of extended-spectrum \u03b2-lactamase (ESBL)-producing enterobacteria, with some changes in the molecular epidemiology of circulating ESBLs. While enzymes of the CTX-M-2 group remain endemic, the emergence of CTX-M-15 and of enzymes of the CTX-M-8 and CTX-M-9 groups was observed. The CTX-M-15-positive isolates represented 40% of CTX-M producers and included representatives of\n            <jats:named-content xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" content-type=\"genus-species\" xlink:type=\"simple\">Escherichia coli<\/jats:named-content>\n            ST131 and\n            <jats:named-content xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" content-type=\"genus-species\" xlink:type=\"simple\">Klebsiella pneumoniae<\/jats:named-content>\n            ST11.\n          <\/jats:p>","DOI":"10.1128\/aac.00745-12","type":"journal-article","created":{"date-parts":[[2012,8,21]],"date-time":"2012-08-21T04:22:25Z","timestamp":1345522945000},"page":"6003-6005","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":53,"title":["Changing Epidemiology of Extended-Spectrum \u03b2-Lactamases in Argentina: Emergence of CTX-M-15"],"prefix":"10.1128","volume":"56","author":[{"given":"S.","family":"Sennati","sequence":"first","affiliation":[{"name":"Dipartimento di Biotecnologie, Sezione di Microbiologia, Universit\u00e0 di Siena, Siena, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G.","family":"Santella","sequence":"additional","affiliation":[{"name":"Facultad de Farmacia y Bioqu\u00edmica, Universidad de Buenos Aires, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Di Conza","sequence":"additional","affiliation":[{"name":"Facultad de Farmacia y Bioqu\u00edmica, Universidad de Buenos Aires, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Pallecchi","sequence":"additional","affiliation":[{"name":"Dipartimento di Biotecnologie, Sezione di Microbiologia, Universit\u00e0 di Siena, Siena, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Pino","sequence":"additional","affiliation":[{"name":"Facultad de Farmacia y Bioqu\u00edmica, Universidad de Buenos Aires, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B.","family":"Ghiglione","sequence":"additional","affiliation":[{"name":"Facultad de Farmacia y Bioqu\u00edmica, Universidad de Buenos Aires, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G. 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