Aminoglycoside resistance determinants in multiresistant Escherichia coli and Klebsiella pneumoniae clinical isolates from Turkish and Syrian patients.

Aminoglycoside resistance determinants in multiresistant Escherichia coli and Klebsiella pneumoniae clinical isolates from Turkish and Syrian patients. Acta Microbiol Immunol Hung. 2019 Feb 26;:1-9 Authors: Cirit OS, Fernández-Martínez M, Yayla B, Martínez-Martínez L Abstract Escherichia coli and Klebsiella pneumoniae are frequently found resistance to aminoglycosides in Turkey. The aim of this study was to investigate aminoglycoside resistance in clinical isolates of E. coli and K. pneumoniae from Turkey using both phenotypic and genotypic methods and screening for the prevalence of gene coding for common aminoglycoside-modifying enzymes (AMEs) and 16S rRNA methylase genes. A total of 88 consecutive, non-duplicated E. coli (n = 65) and K. pneumoniae (n = 23) isolates showing resistance or intermediate resistance to amikacin and/or gentamicin were collected between October 2013 and May 2015 from clinical samples received at Gaziantep Dr. Ersin Arslan Training and Research Hospital. Seventeen isolates were obtained from Syrian patients. Isolates resistant to any of the two aminoglycosides were tested by PCR for seven AME genes, and 22 isolates with amikacin MIC ≥16 mg/L were also tested for 16S rRNA methylase genes. In E. coli isolates, the most frequent genes were aac(6')-Ib (50 strains; 76.9%) and aac(3)-IIa (40 strains; 70.7%), followed by aph(3')-Ia (5 strains; 7.6%) and ant(2″)-Ia (2 strains; 3.1%). Among the 2...
Source: Acta Microbiologica et Immunologica Hungarica - Category: Microbiology Authors: Tags: Acta Microbiol Immunol Hung Source Type: research