Yersinia ruckeri biotype 2 isolates from mainland Europe and the UK likely represent different clonal groups

Wheeler, R.W., Davies, R.L. , Dalsgaard, I., Garcia, J., Welch, T.J., Wagley, S., Bateman, K.S. and Verner-Jeffreys, D.W. (2009) Yersinia ruckeri biotype 2 isolates from mainland Europe and the UK likely represent different clonal groups. Diseases of Aquatic Organisms, 84(1), pp. 25-33. (doi: 10.3354/dao02039)

Full text not currently available from Enlighten.

Abstract

There have been increased reports of outbreaks of enteric redmouth disease (ERM) caused by Yersinia ruckeri in previously vaccinated salmonids in Europe, with some of these outbreaks being attributed to emergent non-motile, Tween 80-negative, biotype 2 isolates. To gain information about their likely origins and relationships, a geographically and temporally diverse collection of isolates were characterised by serotyping, biotyping, pulsed-field gel electrophoresis (PFGE) and outer membrane protein (OMP) profiling. A total of 44 pulsotypes were identified from 160 isolates by PFGE, using the restriction enzyme NotI. Serotype O1 isolates responsible for ERM in rainbow trout in both the US and Europe, and including biotype 2 isolates, represented a distinct subgroup of similar pulsotypes. Biotype 2 isolates, responsible for outbreaks of the disease in rainbow trout in the UK, Denmark and Spain, had different pulsotypes, suggesting that they represented different clones that may have emerged separately. Danish biotype 2 isolates recovered since 1995 were indistinguishable by PFGE from the dominant biotype 1 clone responsible for the majority of outbreaks in Denmark and the rest of mainland Europe. In contrast, US biotype 2 isolate YRNC10 had an identical pulsotype and OMP profile to UK biotype 2 isolates, suggesting that there had been exchange of these isolates between the UK and the US in the past. UK Atlantic salmon isolates were genetically and serologically diverse, with 12 distinct pulsotypes identified among 32 isolates.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Davies, Dr Robert
Authors: Wheeler, R.W., Davies, R.L., Dalsgaard, I., Garcia, J., Welch, T.J., Wagley, S., Bateman, K.S., and Verner-Jeffreys, D.W.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
Journal Name:Diseases of Aquatic Organisms
ISSN:0177-5103
ISSN (Online):1616-1580
Published Online:09 March 2009

University Staff: Request a correction | Enlighten Editors: Update this record