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Granulomatous Rhinitis in a Horse due to Mycobacterium intracellulare Infection
K J Vail1, L W Stranahan1, L M Richardson2
1Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA.
Journal of Comparative Pathology
|June 5, 2019
Summary
Mycobacterium intracellulare, a cause of mycobacteriosis in horses, has not been previously reported. This study details a unique case of this infection presenting as a granulomatous nasal mass in a horse.
Area of Science:
- Veterinary Medicine
- Microbiology
- Equine Health
Background:
- Mycobacterial infections are rare in horses, typically caused by Mycobacterium bovis or Mycobacterium avium.
- Mycobacterium intracellulare, a species within the M. avium complex, has not been documented as a cause of disease in horses.
- Common presentations of equine mycobacteriosis include enteric, pulmonary, or systemic forms.
Observation:
- A case of granulomatous nasal mass in a horse was observed.
- Diagnostic investigations confirmed the presence of Mycobacterium intracellulare within the nasal mass.
Findings:
- This report documents the first known case of Mycobacterium intracellulare infection in a horse.
- The clinical presentation was an unusual granulomatous nasal mass, differing from typical equine mycobacteriosis presentations.
Implications:
- This finding expands the known spectrum of mycobacterial diseases in horses.
- Highlights the importance of considering less common Mycobacterium species in equine diagnostics.
- Suggests potential for novel clinical presentations of mycobacteriosis in horses.
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