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1 June 2009 Investigation and Diagnosis of Nontuberculous Mycobacteriosis in a Captive Herd of Aoudad (Ammotragus lervia)
Timothy J. Portas, Benn R. Bryant, Stephen L. Jones, Kaye Humphreys, Christopher M. Gilpin, Karrie A. Rose
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Abstract

An epizootic of nontuberculous mycobacteriosis occurred in a captive herd of aoudad (Ammotragus lervia) over a period of 18 mo. Each of the affected animals was subject to a thorough postmortem examination that included histopathology, tissue concentration and acid-fast staining, aerobic and anaerobic bacterial culture, mycobacterial culture, and real-time polymerase chain reaction specific for Mycobacterium tuberculosis DNA. Histopathologic lesions consistent with pulmonary mycobacteriosis, including the presence of acid-fast bacteria, were identified in two captive adult male aoudad. M. avium was isolated in culture from the pulmonary parenchyma, and M. parafortuitum was isolated from a mesenteric lymph node of a third animal, an adult female, euthanized subsequent to an illness characterized by progressive dyspnea and tachypnea. M. intracellulare was isolated within the bronchial lymph node of a fourth aoudad, an adult female that was euthanized due to chronic weight loss. Diagnostic testing of the 34 individuals in the herd included collection of blood for an interferon-γ assay, intradermal tuberculin testing, and radiometric fecal culture for M. avium subsp. paratuberculosis. On the basis of this investigation, mycobacteriosis associated with M. bovis, M. tuberculosis, and/or M. avium subsp. paratuberculosis was ruled out and nontuberculous mycobacteriosis was confirmed in this herd.

Timothy J. Portas, Benn R. Bryant, Stephen L. Jones, Kaye Humphreys, Christopher M. Gilpin, and Karrie A. Rose "Investigation and Diagnosis of Nontuberculous Mycobacteriosis in a Captive Herd of Aoudad (Ammotragus lervia)," Journal of Zoo and Wildlife Medicine 40(2), 306-315, (1 June 2009). https://doi.org/10.1638/2008-0103.1
Received: 25 June 2008; Published: 1 June 2009
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