{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T11:27:56Z","timestamp":1790681276955,"version":"4.1.0"},"reference-count":64,"publisher":"Akademiai Kiado Zrt.","issue":"3","content-domain":{"domain":["akjournals.com"],"crossmark-restriction":true},"short-container-title":["AMicr"],"published-print":{"date-parts":[[2018,7,18]]},"abstract":"<jats:p>The aim of this study was to investigate the prevalence of carbapenem-resistant <jats:italic>Klebsiella pneumoniae<\/jats:italic> (CRKP) and the most common types of carbapenemases, metallo-beta-lactamases (MBLs), and extended-spectrum beta-lactamases (ESBLs) among CRKP isolates in a tertiary hospital in Isfahan, Iran. Eighty non-repetitive clinical isolates of <jats:italic>K. pneumoniae<\/jats:italic> were obtained from different clinical specimens. Antibiotic resistance pattern of isolates was determined by disk diffusion method and production of carbapenemases and MBLs was confirmed using modified Hodge test and E-test, respectively. Molecular detection of the antibiotic resistance genes was performed using PCR. Fifty-one (63.8%) isolates have decreased susceptibility to carbapenems, of which 46 (90.2%) isolates were as carbapenemase producer and four (7.8%) isolates were positive for MBLs, phenotypically. The results of PCR showed that the prevalence of <jats:italic>bla<\/jats:italic><jats:sub>OXA-48<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>NDM<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>SHV<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>CTX-M<\/jats:sub>, and <jats:italic>bla<\/jats:italic><jats:sub>TEM<\/jats:sub> genes among CRKP isolates were 90.2%, 15.7%, 98%, 96.1%, and 90.2%, respectively. No isolates carrying the <jats:italic>bla<\/jats:italic><jats:sub>KPC<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>GES<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>IMI<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>VIM<\/jats:sub>, and <jats:italic>bla<\/jats:italic><jats:sub>IMP<\/jats:sub> genes were detected. This study showed that the production of OXA-48 is one of the main mechanisms of resistance to carbapenems in CRKP isolates in Isfahan. In addition, the dissemination of NDM-producing CRKP isolates is a potential risk for the health care system of this area in the near future.<\/jats:p>","DOI":"10.1556\/030.65.2018.034","type":"journal-article","created":{"date-parts":[[2018,7,19]],"date-time":"2018-07-19T12:36:21Z","timestamp":1532003781000},"page":"335-344","update-policy":"https:\/\/doi.org\/10.1556\/policypage.crossmark.crossref.1","source":"Crossref","is-referenced-by-count":19,"title":["The emergence of blaOXA-48 and blaNDM among ESBL-producing Klebsiella pneumoniae in clinical isolates of a tertiary hospital in Iran"],"prefix":"10.1556","volume":"65","author":[{"given":"Mehdi","family":"Moghadampour","sequence":"first","affiliation":[{"name":"1 Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aliakbar","family":"Rezaei","sequence":"additional","affiliation":[{"name":"1 Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jamshid","family":"Faghri","sequence":"additional","affiliation":[{"name":"1 Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"425","reference":[{"key":"ref251","doi-asserted-by":"crossref","first-page":"2763","DOI":"10.1093\/jac\/dkr382","article-title":"Introduction of OXA-48-producing Enterobacteriaceae to Israeli hospitals by medical tourism","volume":"66","author":"Adler","year":"2011","journal-title":"J Antimicrob Chemother"},{"key":"ref111","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1016\/j.ijfoodmicro.2008.03.005","article-title":"PCR detection of Klebsiella pneumoniae in infant formula based on 16S-23S internal transcribed spacer","volume":"125","author":"Liu","year":"2008","journal-title":"Int J Food Microbiol"},{"key":"ref151","doi-asserted-by":"crossref","first-page":"440","DOI":"10.1128\/CMR.00001-07","article-title":"Carbapenemases: The versatile beta-lactamases","volume":"20","author":"Queenan","year":"2007","journal-title":"Clin Microbiol Rev"},{"key":"ref71","doi-asserted-by":"crossref","first-page":"1597","DOI":"10.1093\/jac\/dks121","article-title":"OXA-48-like carbapenemases: The phantom menace","volume":"67","author":"Poirel","year":"2012","journal-title":"J Antimicrob Chemother"},{"key":"ref31","doi-asserted-by":"crossref","first-page":"e57091","DOI":"10.1371\/journal.pone.0057091","article-title":"Genotypic analysis of Klebsiella pneumoniae isolates in a Beijing Hospital reveals high genetic diversity and clonal population structure of drug-resistant isolates","volume":"8","author":"Wang","year":"2013","journal-title":"PLoS One"},{"key":"ref11","doi-asserted-by":"crossref","first-page":"492","DOI":"10.2307\/30141189","article-title":"Evidence of interhospital transmission of extended-spectrum beta-lactam-resistant Klebsiella pneumoniae in the United States, 1986 to 1993. 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