Prevalence and molecular epidemiology of carbapenemase-producing Enterobacterales isolated from dog and cat faeces submitted to veterinary laboratories in the USA

Zoonoses Public Health. 2024 Aug;71(5):538-548. doi: 10.1111/zph.13144. Epub 2024 May 15.

Abstract

Aims: To estimate the prevalence of carbapenemase-producing Enterobacterales (CPE) carriage among pets using faecal specimens submitted to veterinary diagnostic laboratories throughout the US. A secondary aim was to employ whole-genome sequencing (WGS) to characterize isolates of CPE from companion animals and compare them to publicly available CPE genomes.

Methods and results: To estimate the prevalence of CPE in companion animals in the USA, a multicenter surveillance study including 8 different veterinary diagnostic laboratories from across the USA was conducted. Briefly, remnant faecal specimens from dogs and cats were screened using two selective agar plates (CHROMID Carba and MacConkey with 1 mg/L cefotaxime and 0.125 mg/L meropenem) and presumptive CPE isolates screened by the modified carbapenemase inactivation method for carbapenemase production. A total of 2393 specimens were screened and yielded 196 isolates for carbapenemase screening. A total of 5 isolates from 4 dogs and 1 cat at 3 different veterinary diagnostic laboratories were confirmed to produce a carbapenemase (0.21%). Whole-genome sequencing (WGS) revealed two E. coli (ST167) isolates that both produced an NDM-5 carbapenemase, two Enterobacter hormaechei (ST171) isolates that produced an NDM-5 carbapenemase and a KPC-4 carbapenemase respectively and one Klebsiella oxytoca (ST199) that produced an Oxa-48-type carbapenemase. Both E. coli isolates were found to be within at least 22 SNPs of previously characterized canine and human CPE isolates.

Conclusions: This study demonstrates that the prevalence of CPE among companion animals is relatively low (0.21%) but that given the genetic relatedness of animal isolates to human isolates, additional surveillance is needed.

Keywords: carbapenemase‐producing Enterobacterales; cats; companion animals; dogs; prevalence.

MeSH terms

  • Animals
  • Anti-Bacterial Agents / pharmacology
  • Bacterial Proteins* / genetics
  • Bacterial Proteins* / metabolism
  • Cat Diseases* / epidemiology
  • Cat Diseases* / microbiology
  • Cats
  • Dog Diseases* / epidemiology
  • Dog Diseases* / microbiology
  • Dogs
  • Enterobacteriaceae / drug effects
  • Enterobacteriaceae / enzymology
  • Enterobacteriaceae / genetics
  • Enterobacteriaceae / isolation & purification
  • Enterobacteriaceae Infections* / epidemiology
  • Enterobacteriaceae Infections* / microbiology
  • Enterobacteriaceae Infections* / veterinary
  • Feces* / microbiology
  • Molecular Epidemiology
  • Prevalence
  • United States / epidemiology
  • Whole Genome Sequencing
  • beta-Lactamases* / genetics
  • beta-Lactamases* / metabolism

Substances

  • beta-Lactamases
  • carbapenemase
  • Bacterial Proteins
  • Anti-Bacterial Agents