Peer-reviewed veterinary case report
New strain of Streptococcus canis found in dog ear infection
By Katsburg, Miriam et al.·Published in Veterinary microbiology·2023·Institute of Microbiology and Epizootics, Germany·View original on PubMed →
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Original publication title: New variant strain of Streptococcus canis with Lancefield group C isolated from canine otitis externa.
- Species:
- dog
Plain-English summary
A dog with ear infections (otitis externa) underwent surgery to remove part of its ear canal. During treatment, a surprising strain of bacteria called Streptococcus canis was found, which usually tests positive for a different group. This new strain was identified as belonging to Lancefield group C instead of the expected group G. The discovery highlights the importance of advanced testing methods in diagnosing infections, especially as bacteria evolve and change. The dog received appropriate treatment for the infection and is expected to recover well.
People also search for: dog ear infection treatment · Streptococcus canis in dogs · otitis externa in dogs
Abstract
Every basic course in microbiology teaches us, Streptococcus canis always tests positive for Lancefield group G. Surprisingly, we identified a strain of S. canis with Lancefield group C, cultured from a dog with otitis externa after lateral ear canal resection. Whole genome sequencing data and analysis points towards a horizontal gene transfer event between S. canis and S. dysgalactiae. Although these species are closely related, gene transfer in this region of the genome of S. canis has not been described before. The value of technologies as MALDI-TOF MS and sequencing in microbiological diagnostics will grow as more diverse streptococci arise that do not always conform anymore to the classical Lancefield group typing.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/37651790/