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One of the most important types of AMR is carbapenem resistance (CR). CR bacteria are known as an important threat to global public health today. Class B metallo-beta-lactamases (MBLs)\u00a0are one of the major factors for resistance against carbapenems. We aimed to investigate the characteristics of UPEC isolates producing MBL.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      A cross-sectional study was conducted from October 2018 to December 2019 in Ahvaz; Iran. UPEC isolates were identified by biochemical and molecular methods. Metallo-beta-lactamase-producing isolates were detected using modified carbapenem inactivation method (mCIM) and EDTA-CIM (eCIM) tests. MBL genes, phylogenetic group, and virulence genes profile of carbapenem resistant isolates were determined. Conjugation assay and plasmid profiling were conducted to evaluate the ability of transferring of CR to other\n                      <jats:italic>E. coli<\/jats:italic>\n                      isolates. Clonal similarity of isolates were assessed using\n                      <jats:italic>Enterobacterial<\/jats:italic>\n                      intergenic repetitive element sequence (ERIC)-PCR.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among 406 UPEC isolates, 12 (2.95%) carbapenem-resistant were detected of which 11 were phenotypically MBL-producing strains. Four isolates were resistant to all investigated antimicrobial agents and were considered possible pandrug-resistant (PDR).\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>NDM<\/jats:sub>\n                      ,\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>OXA-48<\/jats:sub>\n                      ,\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>IMP-1<\/jats:sub>\n                      , and\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>IMP-2<\/jats:sub>\n                      genes were found in 9, 5, 1, and 1 isolates, respectively. Among 30 virulence genes investigated, the\n                      <jats:italic>traT, fyuA<\/jats:italic>\n                      followed by\n                      <jats:italic>fimH<\/jats:italic>\n                      , and\n                      <jats:italic>iutA<\/jats:italic>\n                      with the frequency of 8 (66.7%), 8 (66.7%), 7 (58.3%), and 7 (58.3%) were the most identified genes, respectively. Siderophore production was the main virulence trait among carbapenem-resistant UPEC isolates. Except for two, all other isolates showed weak to moderate virulence index. In all recovered isolates, CR was readily transmitted via plasmids to other isolates during conjugation experiments.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      MBL and carbapenemase genes, especially\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>NDM<\/jats:sub>\n                      and\n                      <jats:italic>bla<\/jats:italic>\n                      <jats:sub>OXA-48<\/jats:sub>\n                      are spreading rapidly among bacteria, which can be a threat to global public health. Therefore monitoring the emergence and dissemination of new AMR is necessary to continuously refine guidelines for empiric antimicrobial therapy. Understanding the mechanisms of resistance and virulence in this group of bacteria can play an effective role in providing new therapeutic methods.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12941-021-00457-4","type":"journal-article","created":{"date-parts":[[2021,8,3]],"date-time":"2021-08-03T11:24:48Z","timestamp":1627989888000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Virulence characterization and clonal analysis of uropathogenic Escherichia coli metallo-beta-lactamase-producing isolates"],"prefix":"10.1186","volume":"20","author":[{"given":"Fatemeh","family":"Zangane Matin","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1373-7346","authenticated-orcid":false,"given":"Seyedeh Elham","family":"Rezatofighi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Roayaei Ardakani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad Reza","family":"Akhoond","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fahimeh","family":"Mahmoodi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,8,3]]},"reference":[{"key":"457_CR1","doi-asserted-by":"publisher","first-page":"291","DOI":"10.1309\/LMHEP4VQHEY2POOK","volume":"45","author":"H Ghadiri","year":"2014","unstructured":"Ghadiri H, Vaez H, Razavi-Azarkhiavi K, Rezaee R, Haji-Noormohammadi M, Rahimi AA, et al. 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