Background & Aims: One of the most common causes of bacterial resistance to beta-lactam antibiotics is beta-lactamase producing. The aim of this study was to compare the antibiotic resistance of urinary Escherichia coli (E. coli) isolates producing CTX-M and TEM type beta-lactamases, and to determine the strains with co-resistance to multiple antibiotics in Mashhad, Iran. Methods: E. coli b...

The purpose of this study was to investigate the prevalence of extended-spectrum β-lactamase (ESBL)-producing Escherichia coli (ESBL-Ec) in retail chicken meats in Japan. Fifty-six domestic and 50 imported (Brazil, n=36; United States, n=8; Thailand, n=6) chicken meat samples were analyzed. The 162 ESBL-Ec included 111 from 43 (77%) domestic samples and 51 from 26 (52%) Brazilian samples. Fifty...

Objectives. Epidemiological data concerning third-generation cephalosporin (3GC) resistance in wild fauna are scarce. The aim of this study was to characterize the genes, their genetic context, and clonal relatedness 17 Escherichia coli resistant 3GC isolated from animals. Methods. isolates were characterized by short-read whole genome sequencing, long-read sequencing used for hybrid assembly p...

Twenty-eight Klebsiella pneumoniae clinical isolates that exhibited an extended-spectrum cephalosporin-resistance profile from a city in the Northeast of Brazil were analysed by PCR and DNA sequencing in order to determine the occurrence of blaCTX-M genes and class 1 integrons. We determined the occurrence of the blaCTX-M-2 gene in six K. pneumoniae isolates and describe the first detection of ...

Antimicrobial-resistant bacteria and resistance determinants are of great concern to human veterinary medicine worldwide. Extended-spectrum ?-lactamase (ESBL)-producing resistant broad-spectrum cephalosporins. ESBL-producing isolates, including those carrying blaCTX, blaPER, blaVEB, blaGES, have been reported from rivers in several countries.1 In a study performed 2018, using next-generation se...

We characterized extended-spectrum beta-lactamases (ESBLs) and plasmid-mediated quinolone resistance (PMQR) in 32 Escherichia coli extended spectrum cephalosporin (ESC)-resistant clinical isolates from UK companion animals from several clinics. In addition, to investigate the possible dissemination of ESBL clinical isolates within a veterinary hospital, two ESBL-producing E. coli isolates from ...

We report the complete nucleotide sequence of a plasmid, pA31-12, carrying blaCTX-M-55 and mcr-1 from a chicken Escherichia coli isolate. pA31-12 has an IncI2 replicon that displays extensive sequence similarity with pHN1122-1-borne blaCTX-M-55 and pHNSHP45-borne mcr-1 Insertion sequences ISEcp1 and ISApl1 are responsible for the mobilization of blaCTX-M-55 and mcr-1, respectively. The colocali...