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Silva BA, do Amarante VS, Xavier RGC, Colombo SA, da Silva TF, Brenig B, Aburjaile FF, de Carvalho Azevedo VA, Silva ROS. Characterization of ESBL/AmpC-producing extraintestinal Escherichia coli (ExPEC) in dogs treated at a veterinary hospital in Brazil. Res Vet Sci 2024; 166:105106. [PMID: 38086217 DOI: 10.1016/j.rvsc.2023.105106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 12/02/2023] [Accepted: 12/03/2023] [Indexed: 01/01/2024]
Abstract
The clinical aspects and lineages involved in Extraintestinal pathogenic Escherichia coli (ExPEC) infections in dogs remain largely unknown. In this study, we investigated the antimicrobial resistance and molecular structures of ExPECs isolated from infected dogs in Brazil. Samples were obtained from dogs (n = 42) with suspected extraintestinal bacterial infections. Phylogroup B2 was predominant (65.1%). No association was observed between the site of infection, phylogroups, or virulence factors. Almost half of the isolates (44.2%) were MDR, and 20.9% were extended-spectrum β-lactamase (ESBL)-positive. E. coli isolates that were resistant to fluoroquinolones (27.9%) were more likely to be MDR. The CTX-M-15 enzyme was predominant among the ESBL-producing strains, and seven sequence types were identified, including the high-risk clones ST44 and ST131. Single SNPs analysis confirmed the presence of two clonal transmissions. The present study showed a high frequency of ExPECs from phylogroup B2 infecting various sites and a high frequency of ESBL-producing strains that included STs frequently associated with human infection. This study also confirmed the nosocomial transmission of ESBL-producing E. coli, highlighting the need for further studies on the prevention and diagnosis of nosocomial infections in veterinary settings.
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Affiliation(s)
- Brendhal Almeida Silva
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | - Victor Santos do Amarante
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | - Rafael Gariglio Clark Xavier
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | - Salene Angelini Colombo
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | - Tales Fernando da Silva
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | - Bertram Brenig
- Institute of Veterinary Medicine, University of Göttingen, Göttingen, Germany
| | - Flavia Figueira Aburjaile
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil
| | | | - Rodrigo Otávio Silveira Silva
- Veterinary School, Federal University of Minas Gerais, Antônio Carlos Avenue, 6627, Belo Horizonte 31.270-901, MG, Brazil.
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