Beta-lactam, aminoglycoside, and quinolone resistance in Escherichia coli strains isolated from shrimps and mussels in the Marmara Sea

The purpose of the study was to examine prevalence Escherichia coli in shrimps and mussels, determine distribution β-lactam, aminoglycoside, quinolone, multi-drug resistance phenotypically genotypically E. isolates obtained from mussels Istanbul. Faecal samples were collected (n = 96) Marmara Sea coastline fish markets For detection antibiotic susceptibilities, seven groups used. β-lactamase, quinolone genes also determined. A total 34 (17.7%, 15 shrimps, 19 mussels) isolated, 17 (50%) found be resistant one or more antimicrobials. highest seen against aminoglycosides with 11 (32.35%), followed by quinolones 10 (29.41%) extended-spectrum β-lactamase (ESBL) 4 (11.76%). Multi-drug detected 5 (14.7%) 3 shrimp 2 mussel samples. ESBL demonstrated at 3.84% There no AmpC carbapenemase-producing genes. These harbored blaCTX-M-1 3) blaTEM 4). Ten genotypically. Resistance strB isolates, aadA 5, together 3, ANT('')-Ia, aphA1 aphA2 simultaneously 1, aac(3)-IIa 1 isolate. aac(6')-Ib-cr gene only quinolones.