Repository of Research and Investigative Information

Repository of Research and Investigative Information

Ilam University of Medical Sciences

Assessment of 16srRNA Methylase Genes Among Non-ESBL and ESBL-Producing Klebsiella pneumoniae Isolates

Wed May 22 12:04:57 2024

(2019) Assessment of 16srRNA Methylase Genes Among Non-ESBL and ESBL-Producing Klebsiella pneumoniae Isolates. Archives of Clinical Infectious Diseases. p. 7. ISSN 2345-2641

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The aim of our study was to investigate mechanisms of aminoglycoside resistance in extended-spectrum beta-lactamases (ESBL)-producing Klebsiella pneumoniae (K. pneumoniae) isolates from Iran. To this end,154 clinical isolates of K. pneumoniae were collected from two hospitals in Ilam city, Iran. The Kirby-Bauer (agar diffusion) antibiotic testing method was used to determine the susceptibility pattern of the isolates against kanamycin, gentamicin, tobramycin, netilmicin and amikacin. Aminoglycoside acetyltransferases (aac(3)-IIa, aac(6')-Ib, and aac(3)-Ia), 16SrRNA methylase genes (armA and rmtB) and ESBL genes (bla(TEM), bla (SHV), and bla(CTX-M)) were detected by PCR amplification. 59.1 (n = 91) of K. pneumoniae isolates were detected ESBL producers with the phenotypic test. Moreover, bla(TEM), bla (SHV), and bla(CTX-M) were detected in 83.5 (n=76), 52.7 (n=48) and 26.4 (n=24) of the ESBL-producing isolates, respectively. Among 52 resistant or intermediate isolates against aminoglycosides, the aac(3)-IIa, aac(6')-Ib and rmtB genes were detected in 55.8 (n = 29), 80.8 (n = 42) and 1.9 (n =1) of the isolates, respectively; none of the isolates, however, had the aac(3)-Ia and armA genes. Therefore, the results showed the high prevalence of aminoglycosides resistance in the K. pneumoniae isolates. As observed, the acetyltransferase modifying enzymes (aac genes) played major roles in determining this resistance. However, the rate of 16srRNA methylase genes was extremely low in K. pneumoniae.

Item Type: Article
Taherikalani, M.UNSPECIFIED
Hosainzadegan, H.UNSPECIFIED
Keywords: Klebsiella pneumonia Aminoglycosides Antibiotic Susceptibility Extended-Spectrum Beta-Lactamases 16srRNA Methylase Genes high-level resistance ribosomal-rna methylase aminoglycoside resistance north-america enterobacteriaceae surveillance prevalence enzymes europe rmtb Infectious Diseases
Page Range: p. 7
Journal or Publication Title: Archives of Clinical Infectious Diseases
Journal Index: ISI
Volume: 14
Number: 6
Identification Number:
ISSN: 2345-2641
Depositing User: مهندس مهدی شریفی

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