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Medical Microbiology & Diagnosis

ISSN: 2161-0703

Open Access

Extended-spectrum β-lactamases producing multidrug resistant E. coli among dogs, cats and their owners in Pakistan

Abstract

Rana Muhammad Abdullah and Mashkoor Mohsin

Infections caused by multidrug resistant (MDR) E. coli strains are common both in humans and animals. In particular, the pet animals have been considered as a potential carrier of MDR E. coli. Therefore, this study was designed to detect the ESBL producing E. coli isolates in companion animals, their owners and veterinary professionals.  A total of 105 rectal swabs from pets (n=45), their owners (n=45) and veterinary professionals (n=15) were screened for the presence of ESBL producing E. coli, MDR and their genetic relatedness.

A total of 73/105 (69.5%) ESBL producing E. coli were recovered from this study. ESBL E. coli isolates in dogs (18/22) and dog owners (13/22) were 81.8% and 59%, respectively. ESBL E. coli isolates in cats (17/23) and cat owners (13/23) were 74% and 56.5%, respectively. While these E. coli isolates in veterinary professionals (12/15) were 80 %. Of these, isolates 23/73 (31.5%) isolates showed MDR phenotype. Resistance to ampicillin, cefotaxime, ciprofloxacin and nitrofurantoin AMP-CTX-CIP-F represented the most common pattern of MDR (17.4%). None of the isolate was resistant to tobramycin. Among the ESBL E. coli with MDR, PCR detected blaCTX-M as the most common ESBL genotype (19/23).  CTX-M-1 group was found among all the 19 blaCTX-M positive E. coli. Furthermore, BOX-PCR fingerprints showed distinct clonal groups indicating high genetic diversity among CTX-M-1 producing E. coli isolates. The presence of multidrug resistant E. coli in particular of ESBL class CTX-M-1 in dogs, cats, their owners and veterinary health workers pose a zoonotic threat for the spread of multidrug resistant bacteria. 

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