title: Niacin-positive Mycobacterium kansasii isolated from immunocompromised patients.
abstract: Niacin-positive Mycobacterium kansasii was isolated from three patients, two with respiratory infections and one with a perirectal abscess. The isolates were phenotypically similar to other strains of M. kansasii, differing only in their ability to produce niacin. This phenotype has been reported only twice in the literature, during the 1960s.
authors.affiliation: Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia 19104.
authors.forename: I
authors.initials: I
authors.lastname: Nachamkin
authors.forename: R R
authors.initials: RR
authors.lastname: MacGregor
authors.forename: J L
authors.initials: JL
authors.lastname: Staneck
authors.forename: A Y
authors.initials: AY
authors.lastname: Tsang
authors.forename: J C
authors.initials: JC
authors.lastname: Denner
authors.forename: M
authors.initials: M
authors.lastname: Willner
authors.forename: S
authors.initials: S
authors.lastname: Barbagallo
mesh_terms: D000328:Adult; D006679:HIV Seropositivity / Q000382:microbiology; D006801:Humans; D007108:Immune Tolerance; D008297:Male; D008875:Middle Aged; D009525:Niacin / Q000032:analysis*; D009170:Nontuberculous Mycobacteria / Q000737:chemistry / Q000187:drug effects / Q000302:isolation & purification*
chemical_list: D009525:Niacin