Mycobacterium avium-intracellulare infection in a white-faced saki (Pithecia pithecia)

Physical examination of an adult female white-faced saki (Pithecia pithecia) revealed midabdominal multiple cystic structures. The animal developed a grade 3/4 reaction to old mammalian tuberculin injected into the right eyelid. Significant clinicopathologic findings included marked hyperproteinemia (9.2 g/dl), hyperglobulinemia (6.1 g/dl), and hypoalbuminemia (3.1 g/dl). Ultrasonography revealed multiple abdominal masses of varying echogenicity. The animal was euthanized and necropsied. Significant histopathologic findings included multifocal lymphadenitis with cystic degeneration of multiple visceral lymph nodes. Mycobacterium avium-intracellulare was cultured from a mesenteric lymph node.