Two episodes of bacteremia of zoonotic origin caused by different Streptococcus canis isolates in the same patient within a time span of 1 year

Eur J Clin Microbiol Infect Dis. 2024 Feb;43(2):383-387. doi: 10.1007/s10096-023-04718-2. Epub 2023 Nov 24.

Abstract

Two episodes of bacteremia of cutaneous origin in a female patient were caused by two unrelated Streptococcus canis isolates within 1-year interval between the two infection episodes. The most likelihood transmission route in both episodes was a dog pet that habitually licked patient´s legs. Isolates were characterised by antimicrobial susceptibility test and whole genome sequencing. They belonged to sequence type (ST) 40 and 43, respectively. The ST40 isolate harboured antimicrobial resistance genes aadE, ermB and tetO, displaying resistance to erythromycin, clindamycin and tetracyclines, while ST43 isolate did not presented any known antimicrobial resistance determinant and was susceptible to all antibiotics tested. S. canis infections are rare in human; however, attention is needed for patients at risk with companion animals.

Keywords: Bacteremia; Opportunistic pathogen; Streptococcus canis; Zoonotic infections.

Publication types

  • Case Reports

MeSH terms

  • Animals
  • Anti-Bacterial Agents / pharmacology
  • Bacterial Zoonoses* / diagnosis
  • Dogs
  • Drug Resistance, Bacterial / genetics
  • Female
  • Humans
  • Microbial Sensitivity Tests
  • Streptococcal Infections* / microbiology
  • Streptococcal Infections* / veterinary
  • Streptococcus*

Substances

  • Anti-Bacterial Agents

Supplementary concepts

  • Streptococcus canis