title: Opportunistic lung infection caused by Rhodococcus (Corynebacterium) equi.
abstract: Rhodococcus (formerly Corynebacterium) equi, a common animal pathogen, can cause a slowly evolving pneumonia in humans, particularly immunocompromised people. The authors describe two patients; one with acquired immunodeficiency syndrome. On chest radiographs, R. equi produces chronic, localized pulmonary opacities that can cavitate. The main differential diagnoses are tuberculosis and fungal infection.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications; D000328:Adult; D000368:Aged; D003354:Corynebacterium Infections / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D008297:Male; D011014:Pneumonia / Q000000981:diagnostic imaging / Q000209:etiology*; D011859:Radiography