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Analysis of Carbapenemases Genes of Carbapenem-Resistant Klebsiella Pneumoniae Isolated From Tehran Heart Center Publisher



Pourgholi L1 ; Farhadinia H1 ; Hosseindokht M1 ; Ziaee S1 ; Nosrati R2 ; Nosrati M3 ; Boroumand M4
Authors
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Authors Affiliations
  1. 1. Department of Molecular Pathology, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Cellular and Molecular Research Center, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
  3. 3. Department of Infection Control, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Pathology and Laboratory Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran

Source: Iranian Journal of Microbiology Published:2022


Abstract

Background and Objectives: Emerging of carbapenem-resistant Klebsiella pneumoniae (CRKP) is one of the major concerns among healthcare systems. This study aimed to investigate the antibiotic susceptibility pattern and carbapenemase genes of carbapenemase-producing K. pneumoniae isolates obtained from Iranian hospitalized patients. Materials and Methods: This study was performed on 71 CRKP strains isolated from different clinical specimens collected in Tehran Heart Center (Tehran, Iran). A Modified Hodge test (MHT) was done for the detection of carbapenemase-producing K. pneumoniae. The presence of bla,bla,bla,bla, andbla-type carbapenemases was evaluated by the PCR KPC VIM IMP NDM OXA-48 method. Results: We identified 8.82% (71/805) of K. pneumoniae isolates as CRKP by MHT test. The antibiotic susceptibility indicated that all isolates were resistant to imipenem, meropenem, cefotaxime, ceftazidime, cefepime, ceftriaxone, cephalothin, ciprofloxacin, and augmentin, and then mostly resistant to aztreonam, cefoxitin, gentamicin, and trimethoprim/sulfamethox-azole with 98.6%, 98.6%, 97.2%, and 94.4%, respectively. The lowest resistance was related to amikacin with 46.5% (33/71 isolates). The level of imipenem MIC for all carbapenem-resistant isolates was estimated ≥32 µg/mL. Among positive isolates for carbapenemase genes, the most frequent gene was bla. It was found in 48 (67.6%) isolates followed by bla OXA-48VIM in 28 (39.4%) isolates. blaIMP, bla, and bla NDMKPC genes were identified in 19 (26.8%), 13 (18.3%) and 5 (7.0%) isolates, respectively. These genes were not detected in nine isolates. Conclusion: The relatively high frequency of some carbapenemase genes suggests major concern about the emergence of isolates containing carbapenem resistance genes as a potential health threat. © 2022 The Authors.
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