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Osteoarticular Infection in Three Young Thoroughbred Horses Caused by a Novel Gram Negative Cocco-Bacillus

Bernard J Hudson1, Catherine Chicken2, Anna Blishen2

  • 1NSW Health Pathology, Department of Microbiology & Infectious Diseases, Royal North Shore Hospital, St Leonards, Sydney, New South Wales 2065, Australia.

Case Reports in Veterinary Medicine
|February 5, 2020
PubMed

Insights

Three young thoroughbred horses developed osteoarticular infections (OAI) caused by a novel Kingella-like species. Phylogenetic analysis suggests this organism may represent a previously unrecognized species, distinct from known Kingella.

Area of Science:

  • Veterinary Microbiology
  • Equine Infectious Diseases
  • Bacterial Taxonomy

Background:

  • Osteoarticular infections (OAI) are significant in young horses.
  • Kingella species are known causes of OAI in humans, but rarely reported in horses.
  • Accurate identification of causative agents is crucial for effective treatment and understanding disease transmission.

Observation:

  • Three cases of OAI in young thoroughbred horses were analyzed.
  • The clinical presentation of OAI in these horses mimicked human Kingella infections.

Findings:

  • MALDI-TOF identified the causative agent as Kingella species.
  • Phylogenetic analysis using 16S rRNA PCR placed the isolates closer to Simonsiella and Alysiella species.
  • Average nucleotide identity (ANI) comparisons indicated the isolates represent a previously unrecognized species.

Implications:

  • This study identifies a potentially novel bacterial species causing OAI in horses.
  • Further research is needed to fully characterize this new species and its pathogenicity.
  • This discovery may impact diagnostic approaches and treatment strategies for equine OAI.

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