Granulomatous Rhinitis in a Horse due to Mycobacterium intracellulare Infection

• Published in: Journal of comparative pathology Vol. 169; pp. 30 - 34
• Main Authors: Vail, K.J., Stranahan, L.W., Richardson, L.M., Yanchik, A.E., Arnold, C.E., Porter, B.F., Wiener, D.J.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-05-2019
• Subjects: Animals; Granuloma - veterinary; granulomatous inflammation; horse; Horse Diseases - microbiology; Horse Diseases - pathology; Horses; Male; Mycobacterium avium complex; Mycobacterium avium-intracellulare Infection - veterinary; nasal mass; Rhinitis - veterinary; horse; nasal mass; Mycobacterium avium complex; granulomatous inflammation
• ISSN: 0021-9975; 1532-3129
• DOI: 10.1016/j.jcpa.2019.04.001

Mycobacterial infections in horses are uncommon, but are caused most frequently by Mycobacterium bovis of the Mycobacterium tuberculosis complex or Mycobacterium avium of the M. avium complex. Disease caused by Mycobacterium intracellulare, the second most common species within the M. avium complex, has not been reported in horses to date. Mycobacteriosis in horses most often presents as enteric, pulmonary or, rarely, systemic disease. Here we report a case of M. intracellulare infection in a horse presenting as a granulomatous nasal mass.