Yanat Betitra1, Vinuesa Teresa2, Viñas Miguel2, Touati Abdelaziz3. 1. Laboratoire d'écologie Microbiologie. Université A/Mira de Bejaia, Algérie; Laboratory of Molecular Microbiology and Antibiotics, Dept. Pathology and Experimental therapeutics. Medical School, University of Barcelona, Spain. 2. Laboratory of Molecular Microbiology and Antibiotics, Dept. Pathology and Experimental therapeutics. Medical School, University of Barcelona, Spain. 3. Laboratoire d'écologie Microbiologie. Université A/Mira de Bejaia, Algérie. Electronic address: ziz1999@yahoo.fr.
Abstract
OBJECTIVE: To investigate the mechanisms of quinolone resistance and the association with other resistance markers among Esherichia coli (E. coli) strains isolated from outpatient with urinary tract infection in north of Algeria. METHODS: A total of 30 nalidixic acid-resistant E. coli isolates from outpatient with urinary tract infections from January 2010 to April 2011 in north of Algeria (Bejaia) were studied. Antimicrobial susceptibility was determined by disc diffusion assay, minimal inhibitory concentrations (MIC) of quinolone were determined by microdilution. Mutations in the Quinolone Resistance-Determining Region (QRDR) of gyrA and parC genes and screening for qnr (A, B and S) and bla genes were done by PCR and DNA sequencing. RESULTS: Most of the E. coli isolates (56.66%) were shown to carry mutations in gyrA and parC (gyrA: Ser83Leu + Asp87Asn and parC:Ser80Ile). While, 16.66% had only an alteration in gyrA: Ser83Leu. One isolate produced qnrB-like and two qnrS-like. Four isolates were CTX-M-15 producers associated with TEM-1 producing in one case. Co-expression of blaCTX-M-15 and qnrB was determined in one E. coli isolate. CONCLUSIONS: Our findings suggested the community emergence of gyrA and parC alterations and Qnr determinants that contributed to the development and spread of fluoroquinolone resistance in Algerian E. coli isolates.
OBJECTIVE: To investigate the mechanisms of quinolone resistance and the association with other resistance markers among Esherichia coli (E. coli) strains isolated from outpatient with urinary tract infection in north of Algeria. METHODS: A total of 30 nalidixic acid-resistant E. coli isolates from outpatient with urinary tract infections from January 2010 to April 2011 in north of Algeria (Bejaia) were studied. Antimicrobial susceptibility was determined by disc diffusion assay, minimal inhibitory concentrations (MIC) of quinolone were determined by microdilution. Mutations in the Quinolone Resistance-Determining Region (QRDR) of gyrA and parC genes and screening for qnr (A, B and S) and bla genes were done by PCR and DNA sequencing. RESULTS: Most of the E. coli isolates (56.66%) were shown to carry mutations in gyrA and parC (gyrA: Ser83Leu + Asp87Asn and parC:Ser80Ile). While, 16.66% had only an alteration in gyrA: Ser83Leu. One isolate produced qnrB-like and two qnrS-like. Four isolates were CTX-M-15 producers associated with TEM-1 producing in one case. Co-expression of blaCTX-M-15 and qnrB was determined in one E. coli isolate. CONCLUSIONS: Our findings suggested the community emergence of gyrA and parC alterations and Qnr determinants that contributed to the development and spread of fluoroquinolone resistance in Algerian E. coli isolates.
Authors: Sawsan Mohammed Kareem; Israa M S Al-Kadmy; Saba S Kazaal; Alaa N Mohammed Ali; Sarah Naji Aziz; Rabab R Makharita; Abdelazeem M Algammal; Salim Al-Rejaie; Tapan Behl; Gaber El-Saber Batiha; Mohamed A El-Mokhtar; Helal F Hetta Journal: Infect Drug Resist Date: 2021-02-12 Impact factor: 4.003