Clinical strains of Enterobacter were isolated from Cumana's Central Hospital in Venezuela, and classified as E. cloacae (21), E. aerogenes (7), E. intermedium (1), E. sakazakii (1) and three unclassified. The strains showed high levels of resistance, especially to SXT (58.1%), CRO (48.8%), CAZ (46.6%), PIP (46.4%), CIP (45.2%) and ATM (43.3%). This is the first report for South America of blaV...

In this study, we assessed the presence of IS26 in food-borne ASSuT-type Salmonella enterica isolates. A new genetic region (R3) was described, that included a C14 caspase gene between IS26 elements. R3 was present in two Salmonella Rissen isolates from a swine carcass and a meat handler, collected at the same abattoir. Furthermore, a new rearrangement of resistance region R1, harboring the bla...

Methods: E. coli was isolated from 388 broiler chicken caecal samples from 22 abattoirs and from boot swabs from 442 turkey flocks over successive 1 year periods. CHROMagar ECC with and without cephalosporin antibiotics was used as isolation medium and the chicken study also used CHROMagar CTX. ESBL phenotype isolates were tested for the presence of blaCTX-M, blaOXA, blaSHV, blaTEM and ampC gen...

Migratory birds may have a vital role in the spread of antimicrobial resistance across habitats and regions, but empirical data remain scarce. We investigated differences gut microbiome composition abundance antibiotic genes (ARGs) faeces from four migratory waterbirds wintering South-West Spain that differ their habitat use. The white stork Ciconia ciconia lesser black-backed gull Larus fuscus...

The VITEK 2 (bioMérieux Inc., Hazelwood, MO) automated system employs an advanced expert system (AES) analyzing antimicrobial susceptibility test results according to the bacterial species (2). According to the AES, the piperacillin susceptibilities of all Klebsiella spp. are converted to resistance even though the automated MICs determined for their isolates are low. In contrast, other automat...

In gram-negative pathogens, extended-spectrum beta-lactamases (ESBLs) confer resistance to penicillins, cephalosporins (including extended-spectrum cephalosporins), and aztreonam, but not to cephamycins and carbapenems, and are inhibited by beta-lactamase inhibitors (8). Recently, cefotaximases have become the most prevalent ESBLs worldwide (7) and have also been detected in animals (see, for i...