Development of a multilocus sequence typing scheme for intestinal spirochaetes within the genus Brachyspira

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Therese Råsbäck
  • K.-E. Johansson
  • D. S. Jansson
  • C. Fellström
  • M. Y. Alikhani
  • T. La
  • D. S. Dunn

Detail(s)

Original languageEnglish
Pages (from-to)4074-4087
Journal / PublicationMicrobiology
Volume153
Issue number12
Online published1 Dec 2007
Publication statusPublished - Dec 2007
Externally publishedYes

Abstract

The purpose of this study was to evaluate a multilocus sequence typing (MLST) scheme for intestinal spirochaetes of the genus Brachyspira. Eight loci mainly coding for enzymes previously used in multilocus enzyme electrophoresis analysis of Brachyspira species were examined in 66 Brachyspira field isolates and type/reference strains. The isolates and strains were recovered from pigs, birds, dogs and a mouse and originated from seven European countries, the USA and Canada. Forty-six isolates represented recognized Brachyspira species and 20 represented provisionally designated species or isolates that have not been classified. Only two loci gave PCR products for all 66 strains and isolates, but amplicons for seven loci were obtained for 44 of the isolates. Sequences for each locus had a DNA allelic variation of 30–47 and an amino acid allelic variation of 14–47 that gave rise to the same number of sequence and amino acid types (58) for the strains and isolates studied. A population snapshot based on sequence and amino acid types showed a close phylogenetic relationship amongst the porcine isolates from the same geographical regions, and indicated a close evolutionary relationship between isolates recovered from pigs and mallards. A general concordance was obtained between the MLST groupings and classifications based on culture and biochemical tests, 16S rDNA sequence analysis and random amplified polymorphic DNA analysis. This is a first step towards establishing an MLST system for use in identifying Brachyspira species and determining relationships between individual strains and species in the genus.

Citation Format(s)

Development of a multilocus sequence typing scheme for intestinal spirochaetes within the genus Brachyspira. / Råsbäck, Therese; Johansson, K.-E.; Jansson, D. S. et al.
In: Microbiology, Vol. 153, No. 12, 12.2007, p. 4074-4087.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review