The predominance of Klebsiella pneumoniae carbapenemase (KPC-type) gene among high-level carbapenem-resistant Klebsiella pneumoniae isolates in Baghdad, Iraq.

Publisher: Reidel Country of Publication: Netherlands NLM ID: 0403234 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-4978 (Electronic) Linking ISSN: 03014851 NLM ISO Abbreviation: Mol Biol Rep Subsets: MEDLINE

Original Publication: Dordrecht, Boston, Reidel.

Carbapenem-Resistant Enterobacteriaceae* ; Klebsiella pneumoniae*/genetics; Anti-Bacterial Agents/pharmacology ; Bacterial Proteins/genetics ; Bacterial Proteins/metabolism ; Carbapenems/pharmacology ; Humans ; Imipenem ; Iraq ; Meropenem ; Microbial Sensitivity Tests ; beta-Lactamases/genetics ; beta-Lactamases/metabolism

Background: The serine carbapenemase enzymes (KPC) which produce from bacteria klebsiella pneumoniae today have been emerged as one of the β-lactamase enzymes that is capable to inactivating the last line of carbapenems. The gene encoding the K. pneumonia (bla KPC ) belongs to gene carried on plasmid among Enterobacteriaceae family, which has modulation for the infections control so this study is aimed to spot the presence and evaluate bla KPC gene expression by real-time PCR in local isolates of K. pneumonia.
Methods: Forty-seven of K. pneumonia isolates were isolated from different clinical samples (blood, sputum, urine, wounds and burns) from patients in separate hospitals in Baghdad., Antimicrobial sensitivity test was carried out by vitik-2 system and Kirby- Bauer method. The PCR was employed to detect carbapenemase gene.
Results: The results of this study showed that all explored isolates were resistant to Ertapenem, Meropenem and imipenem 47(100%). Phenotypically, all the isolates had carbapenemase which hydrolyzed the carbapenem antibiotics. Furthermore, the isolates showed (100%) resistance to Cefazolin, Ampicillin and Amoxicillin/ Clavulic acid. However, the most effective antibiotic was Levofloxacin (91.5%). The results of conventional PCR technique for the detection of bla KPC gene showed that 38 (80.9%) isolates of carbapenem-resistant K. pneumoniae harboured bla KPC gene (1010 bp), while none carried other carbapenemase genes including bla NDM1 , bla VIM and bla IMP genes. High levels of carbapenem resistance was clarified by the imipenem and meropenem MICs determination. All 38 isolates were positive in CNPT. Furthermore, the 38 isolates showed over expression of bla KPC gene compared with housekeeping rpo gene in Real-Time PCR.
Conclusions: According to these results, the resistant isolates to carbapenem were belong to the present and high level expression of bla KPC gene in our local isolates.
(© 2022. The Author(s), under exclusive licence to Springer Nature B.V.)

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Keywords: Carbapenem; Carbapenem resistance; KPC-Gene and Real-Time PCR; Klebsiella pneumonia

0 (Anti-Bacterial Agents)
0 (Bacterial Proteins)
0 (Carbapenems)
71OTZ9ZE0A (Imipenem)
EC 3.5.2.6 (beta-Lactamases)
EC 3.5.2.6 (carbapenemase)
FV9J3JU8B1 (Meropenem)

Date Created: 20220426 Date Completed: 20220712 Latest Revision: 20220712

20240104

10.1007/s11033-022-07314-3

35471622