{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T03:42:25Z","timestamp":1791171745036,"version":"4.1.0"},"reference-count":23,"publisher":"American Society for Microbiology","issue":"4","license":[{"start":{"date-parts":[[2010,4,1]],"date-time":"2010-04-01T00:00:00Z","timestamp":1270080000000},"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":[[2010,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n          <jats:p>\n            We characterized 67\n            <jats:italic>Escherichia coli<\/jats:italic>\n            isolates with reduced susceptibility to cefotaxime or ceftiofur obtained from healthy broilers housed in five Italian farms. The\n            <jats:italic>bla<\/jats:italic>\n            <jats:sub>CTX-M-1<\/jats:sub>\n            ,\n            <jats:italic>bla<\/jats:italic>\n            <jats:sub>CTX-M-32<\/jats:sub>\n            and\n            <jats:italic>bla<\/jats:italic>\n            <jats:sub>SHV-12<\/jats:sub>\n            \u03b2-lactamase genes were identified on IncI1, IncN, or IncFIB plasmids. Considerable genetic diversity was detected among the extended-spectrum \u03b2-lactamase (ESBL)-producing isolates, and we identified indistinguishable strains in unrelated farms and indistinguishable plasmids in genetically unrelated strains. The detection of highly mobile plasmids suggests a potential animal reservoir for \u03b2-lactamase genes.\n          <\/jats:p>","DOI":"10.1128\/aac.01361-09","type":"journal-article","created":{"date-parts":[[2010,1,26]],"date-time":"2010-01-26T02:12:07Z","timestamp":1264471927000},"page":"1623-1626","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":69,"title":["High Diversity of Extended-Spectrum \u03b2-Lactamases in\n            <i>Escherichia coli<\/i>\n            Isolates from Italian Broiler Flocks"],"prefix":"10.1128","volume":"54","author":[{"given":"Valeria","family":"Bortolaia","sequence":"first","affiliation":[{"name":"Department of Veterinary Disease Biology, Faculty of Life Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luca","family":"Guardabassi","sequence":"additional","affiliation":[{"name":"Department of Veterinary Disease Biology, Faculty of Life Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcello","family":"Trevisani","sequence":"additional","affiliation":[{"name":"Department of Veterinary Public Health and Animal Pathology, Faculty of Veterinary Medicine, University of Bologna, 40064 Ozzano Emilia, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Magne","family":"Bisgaard","sequence":"additional","affiliation":[{"name":"Department of Veterinary Disease Biology, Faculty of Life Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luciano","family":"Venturi","sequence":"additional","affiliation":[{"name":"and Department of Public Health, Azienda Sanitaria Locale (ASL) di Ravenna, 48100 Ravenna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders Miki","family":"Bojesen","sequence":"additional","affiliation":[{"name":"Department of Veterinary Disease Biology, Faculty of Life Sciences, University of Copenhagen, 1870 Frederiksberg C, Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.vetmic.2009.10.024"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-0691.2007.01850.x"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.mimet.2005.03.018"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-0691.2007.01851.x"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.01707-08"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1099\/ijs.0.02330-0"},{"key":"e_1_3_2_8_2","unstructured":"Performance standards for antimicrobial disk susceptibility tests; approved standard 2006"},{"key":"e_1_3_2_9_2","unstructured":"Methods for dilution antimicrobial susceptibility tests for bacteria that grow aerobically; approved standard 2006"},{"key":"e_1_3_2_10_2","unstructured":"Performance standards for antimicrobial disk and dilution susceptibility tests for bacteria isolated from animals; approved standard 2008"},{"key":"e_1_3_2_11_2","unstructured":"Performance standards for antimicrobial susceptibility testing; 18th informational supplement. 2008"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkn453"},{"key":"e_1_3_2_13_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkn131"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.1128\/AEM.02491-06"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkg473"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dki190"},{"key":"e_1_3_2_17_2","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.43.2.826-831.2005"},{"key":"e_1_3_2_18_2","doi-asserted-by":"publisher","DOI":"10.1093\/jac\/dkn428"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.01014-08"},{"key":"e_1_3_2_20_2","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-0691.2006.01603.x"},{"key":"e_1_3_2_21_2","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.00068-06"},{"key":"e_1_3_2_22_2","doi-asserted-by":"publisher","DOI":"10.1128\/AAC.01070-06"},{"key":"e_1_3_2_23_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2672.1999.00715.x"},{"key":"e_1_3_2_24_2","unstructured":"Clin. 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