Lung tuberculosis in a horse caused by Mycobacterium avium subsp. avium of serotype 2: a case report

https://doi.org/10.17221/1987-VETMEDCitation:Pavlik I., Jahn P., Moravkova M., Matlova L., Treml F., Cizek A., Nesnalova E., Dvorska-Bartosova L., Halouzka R. (2008): Lung tuberculosis in a horse caused by Mycobacterium avium subsp. avium of serotype 2: a case report. Veterinarni Medicina, 53: 111-116.
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Interstitial pneumonia (2/3 of the lungs were affected) and diffusely enlarged bronchial and mediastinal lymph nodes were diagnosed by gross examination of a dead 16-year-old mare. Based on histopathological examination and the detection of acid-fast rods after staining by the Ziehl-Neelsen technique, tuberculosis was suspected. Mycobacterium avium subsp. avium of serotype 2 and IS901+/IS1245+ genotype was isolated from the pulmonary lymphnode after five-week incubation at 37°C. Due to the fact that horses have a naturally high resistance to mycobacterial infections, the high age of the mare most likely contributed to the development of the disease.
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