title: Pulmonary infection caused by niacin-positive Mycobacterium avium.
mesh_terms: D000818:Animals; D001717:Birds; D006801:Humans; D008297:Male; D008875:Middle Aged; D009162:Mycobacterium avium / Q000302:isolation & purification; D009539:Nicotinic Acids; D014379:Tuberculosis, Avian / Q000382:microbiology*
chemical_list: D009539:Nicotinic Acids