A 7 yr old spayed female Labrador retriever was evaluated for progressive nonambulatory tetraparesis, obtundation, joint pain, and pyrexia. The dog was diagnosed with spinal epidural empyema, bacteremia, endocarditis, and polyarthritis based on magnetic resonance imaging, echocardiography, joint fluid analysis, and blood culture. Blood culture isolated a rare and atypical pathogen, Brevundimonas vesicularis in conjunction with Escherchia coli. The patient was treated with a 10 mo antibiotic course, and clinical signs quickly resolved. This is the first report of B vesicularis in association with bacteremia, endocarditis, spinal empyema, and polyarthritis in a dog.

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