title: The Vitamin Requirements of Kurthia zopfii and Kurthia gibsonii.
abstract: The vitamin requirements of 17 K. gibsonii strains, 41 K. zopfii strains and 11 presumptive Kurthia isolates which could not be assigned to either species, were determined. When supplied with Casamino acids and/or Casitone the K. gibsonii strains required biotin + thiamine for growth whereas the K. zopfii strains required biotin + thiamine + pantothenic acid. The difference in their requirements provides support for the existence of the two species within the genus. Eight of the 11 presumptive Kurthia isolates had vitamin requirements different from both K. zopfii and K. gibsonii; their taxonomic position remained unresolved.
authors.affiliation: Department of Microbiology, University of Reading, Reading RG1 5AQ, England.
authors.forename: S
authors.initials: S
authors.lastname: Shaw
authors.forename: R M
authors.initials: RM
authors.lastname: Keddie