{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T19:24:32Z","timestamp":1777922672877,"version":"3.51.4"},"reference-count":45,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2013,12,1]],"date-time":"2013-12-01T00:00:00Z","timestamp":1385856000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Microbial Drug Resistance"],"published-print":{"date-parts":[[2013,12]]},"abstract":"<jats:p>\n                    Drug-resistant derivatives of serovar-specific virulence plasmids, such as pSLT, in clinically-relevant\n                    <jats:italic toggle=\"yes\">Salmonella enterica<\/jats:italic>\n                    serovar Typhimurium strains, represent a threat for human health. We have analysed 14\n                    <jats:italic toggle=\"yes\">S<\/jats:italic>\n                    . Typhimurium isolates recovered in Italy and the United Kingdom from swine and from cases of human infection for the presence of virulence-resistance (VR) plasmids. They were negative for the multidrug resistance (MDR) region of the\n                    <jats:italic toggle=\"yes\">Salmonella<\/jats:italic>\n                    genomic island 1 (SGI1), but expressed resistance to ampicillin, chloramphenicol, streptomycin\/spectinomycin, sulfamethoxazole, and tetracyclines. The isolates were characterised by XbaI pulsed-field gel electrophoresis, multilocus sequence typing, and detection of resistance and virulence determinants (PCR\/sequencing). Identification of VR plasmids was accomplished by PCR detection of\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    genes (encoding ampicillin resistance), class 1 integrons and the pSLT virulence gene\n                    <jats:italic toggle=\"yes\">spvC<\/jats:italic>\n                    . Plasmid analyses were performed by alkaline lysis, S1-nuclease digestion, replicon typing, conjugation, restriction analyses, and Southern blot\/hybridization. Two\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>OXA-1<\/jats:sub>\n                    positive isolates contained pSLT-derived plasmids related to pUO-StVR2. In nine isolates, eight from swine and one from a patient, MDR-conferring-IncFII-VR plasmids were detected. They contained the\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>TEM-1<\/jats:sub>\n                    gene as well as a nonconventional class 1 integron with\n                    <jats:italic toggle=\"yes\">dfrA12-aadA2<\/jats:italic>\n                    gene cassettes in its variable region, and a\n                    <jats:italic toggle=\"yes\">sul3<\/jats:italic>\n                    gene in the 3\u2032 conserved segment. Restriction analysis suggested a novel pSLT variant. The results obtained underline the role of swine as a potential reservoir for the\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>TEM-1<\/jats:sub>\n                    -IncFII-plasmids. The occurrence and spread of virulence- and MDR-conferring plasmids should be considered as a potential public health problem.\n                  <\/jats:p>","DOI":"10.1089\/mdr.2012.0226","type":"journal-article","created":{"date-parts":[[2013,6,29]],"date-time":"2013-06-29T09:50:30Z","timestamp":1372499430000},"page":"437-445","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":9,"title":["<i>Salmonella enterica<\/i>\n                    <i>serovar<\/i>\n                    Typhimurium Virulence-Resistance Plasmids Derived from the pSLT Carrying Nonconventional Class 1 Integrons with\n                    <i>dfrA12<\/i>\n                    Gene in Their Variable Region and\n                    <i>sul3<\/i>\n                    in the 3\u2032 Conserved Segment"],"prefix":"10.1177","volume":"19","author":[{"given":"Janine","family":"Beutlich","sequence":"first","affiliation":[{"name":"Federal Institute for Risk Assessment (BfR)","place":["Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. Rosario","family":"Rodicio","sequence":"additional","affiliation":[{"name":"University of Oviedo","place":["Spain"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. Carmen","family":"Mendoza","sequence":"additional","affiliation":[{"name":"University of Oviedo","place":["Spain"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Patricia","family":"Garc\u00eda","sequence":"additional","affiliation":[{"name":"University of Oviedo","place":["Spain"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miranda","family":"Kirchner","sequence":"additional","affiliation":[{"name":"Animal Health and Veterinary Laboratories Agency (AHVLA)","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ida","family":"Luzzi","sequence":"additional","affiliation":[{"name":"Department of Infectious, Parasitic and Immune-Mediated Diseases, Istituto Superiore di Sanita (ISS), Rome, Italy."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dik","family":"Mevius","sequence":"additional","affiliation":[{"name":"Central Veterinary Institute (CVI) of Wageningen UR","place":["The Netherlands"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John","family":"Threlfall","sequence":"additional","affiliation":[{"name":"Centre for Infections","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reiner","family":"Helmuth","sequence":"additional","affiliation":[{"name":"Federal Institute for Risk Assessment (BfR)","place":["Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Beatriz","family":"Guerra","sequence":"additional","affiliation":[{"name":"Federal Institute for Risk Assessment (BfR)","place":["Germany"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2013,12]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1089\/mdr.2008.0812"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1017\/S0022172400056187"},{"key":"e_1_3_3_4_2","doi-asserted-by":"crossref","first-page":"1545","DOI":"10.1128\/AAC.01275-06","article-title":"Dissemination of sul3-containing elements linked to class 1 integrons with an unusual 3' conserved sequence region among Salmonella isolates","volume":"51","author":"Antunes P.","year":"2007","unstructured":"Antunes P., , Machado J., , Peixe L. 2007. Dissemination of sul3-containing elements linked to class 1 integrons with an unusual 3' conserved sequence region among Salmonella isolates. Antimicrob. Agents Chemother., 51:1545\u20131548.","journal-title":"Antimicrob. Agents Chemother."},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1038\/nrmicro909"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1006\/abio.1995.1220"},{"key":"e_1_3_3_7_2","doi-asserted-by":"crossref","first-page":"5655","DOI":"10.1128\/AEM.00425-11","article-title":"Antimicrobial resistance and virulence determinants in European Salmonella Genomic Island 1 positive Salmonella enterica isolates from different origins","volume":"77","author":"Beutlich J.","year":"2011","unstructured":"Beutlich J., , Jahn S., , Malorny B., , Hauser E., , H\u00fchn S., , Schroeter A., , Rodicio M.R., , Appel B., , Threlfall J., , Mevius D., , Helmuth R., , Guerra B. on behalf of the Med-Vet- Net WP21 Project Group. 2011. Antimicrobial resistance and virulence determinants in European Salmonella Genomic Island 1 positive Salmonella enterica isolates from different origins. Appl. Environ. Microbiol., 77:5655\u20135664.","journal-title":"Appl. Environ. Microbiol."},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1128\/JB.183.19.5725-5732.2001"},{"key":"e_1_3_3_9_2","unstructured":"Bundesinstitut f\u00fcr Risikobewertung. 2010. 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Dis."},{"key":"e_1_3_3_30_2","doi-asserted-by":"crossref","first-page":"476","DOI":"10.1128\/iai.38.2.476-486.1982","article-title":"Association of adhesive, invasive, and virulent phenotypes of Salmonella Typhimurium with autonomous 60-megadalton plasmids","volume":"38","author":"Jones G.W.","year":"1982","unstructured":"Jones G.W., , Rabert D.K., , Svinarich D.M., , Whitfield H.J. 1982. Association of adhesive, invasive, and virulent phenotypes of Salmonella Typhimurium with autonomous 60-megadalton plasmids. Infect. Immun., 38:476\u2013486.","journal-title":"Infect. 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