{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T05:34:24Z","timestamp":1791264864295,"version":"4.1.0"},"reference-count":18,"publisher":"American Society for Microbiology","issue":"5","license":[{"start":{"date-parts":[[2005,5,1]],"date-time":"2005-05-01T00:00:00Z","timestamp":1114905600000},"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":[[2005,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            Clonal dissemination of extended-spectrum \u03b2-lactamases (ESBL) in 170\n            <jats:italic>Escherichia coli<\/jats:italic>\n            isolates and 70\n            <jats:italic>Klebsiella pneumoniae<\/jats:italic>\n            isolates from a nationwide study of 40 Spanish centers in 2000 was not observed in most centers. The most prevalent ESBL were CTX-M-9 (27.3%), SHV-12 (23.9%), and CTX-M-14 (20.5%) for\n            <jats:italic>E. coli<\/jats:italic>\n            and TEM-3 (16.7%) and TEM-4 (25%) for\n            <jats:italic>K. pneumoniae<\/jats:italic>\n            . A new ESBL, TEM-133, with mutations L21F, E104K, and R164S, was identified.\n          <\/jats:p>","DOI":"10.1128\/aac.49.5.2122-2125.2005","type":"journal-article","created":{"date-parts":[[2005,4,26]],"date-time":"2005-04-26T23:32:47Z","timestamp":1114558367000},"page":"2122-2125","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":101,"title":["Nationwide Study of\n            <i>Escherichia coli<\/i>\n            and\n            <i>Klebsiella pneumoniae<\/i>\n            Producing Extended-Spectrum \u03b2-Lactamases in Spain"],"prefix":"10.1128","volume":"49","author":[{"given":"J. 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