Extended-Spectrum-β-Lactamase- and AmpC-Producing Escherichia coli in Domestic Dogs: Spread, Characterisation and Associated Risk Factors

Autor: Nicoletta Formenti, Andrea Grassi, Giovanni Parisio, Claudia Romeo, Flavia Guarneri, Laura Birbes, Alessandra Pitozzi, Federico Scali, Antonio Marco Maisano, Maria Beatrice Boniotti, Paolo Pasquali, Giovanni Loris Alborali
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Antibiotics, Vol 10, Iss 10, p 1251 (2021)
Druh dokumentu: article
ISSN: 2079-6382
DOI: 10.3390/antibiotics10101251
Popis: In veterinary medicine, the issue of antimicrobial resistance was mainly addressed in food-producing animals (although companion animals also deserve attention). Indeed, these species may be reservoir of resistant microorganisms, such as extended-spectrum β-lactamase and AmpC (ESBL/AmpC)-producing bacteria. Dogs in particular may transmit them to close-contact humans. Overall 266 faecal samples of healthy dogs were microbiologically and molecularly analyzed to investigate ESBL/AmpC-producing Escherichia coli and the effects of host and environmental factors on their spread. A prevalence of 25.9% of ESBL/AmpC-producing E. coli, supported by blaCTX-M (79.7%), blaTEM (47.8%), blaCMY (13%), and blaSHV (5.8%) gene detection, emerged. Dogs frequenting extra-urban environments showed significantly higher odds of being positive to ESBL/AmpC E. coli (30.2%) compared to urban dogs (16.7%) identifying the environment as a risk factor. About 88.4% of isolates were resistant to cephalosporins, 8.7% to cephalosporins and carbapenems, and 2.9% to cephalosporins, carbapenems, and penicillins. ESBL/AmpC-producing E. coli expressing blaCMY were significantly more resistant to cefoxitin, cefotaxime/clavulanic acid and ceftazidime/clavulanic acid, highlighting its negative effects. Our results suggest the role of domestic dogs as a maintenance host of ESBL/AmpC-producing E. coli leading to a constant health monitoring. The recorded resistances to carbapenems implies attention and further investigations.
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