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Angiostrongylus vasorum from South America and Europe represent distinct lineages

Published online by Cambridge University Press:  07 January 2009

R. JEFFERIES ,
S. E. SHAW ,
M. E. VINEY  and
E. R. MORGAN
R. JEFFERIES*
Affiliation:
School of Biological Sciences, University of Bristol, BristolBS8 1UG, UK Department of Clinical Veterinary Sciences, University of Bristol, Langford, North SomersetBS40 5DU, UK
S. E. SHAW
Affiliation:
Department of Clinical Veterinary Sciences, University of Bristol, Langford, North SomersetBS40 5DU, UK
M. E. VINEY
Affiliation:
School of Biological Sciences, University of Bristol, BristolBS8 1UG, UK
E. R. MORGAN
Affiliation:
School of Biological Sciences, University of Bristol, BristolBS8 1UG, UK Department of Clinical Veterinary Sciences, University of Bristol, Langford, North SomersetBS40 5DU, UK
*
*Corresponding author: School of Biological Sciences, University of Bristol, BristolBS8 1UG, UK. Tel: +44 (0) 117 9287489. E-mail: [email protected]
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Summary

Angiostrongylus vasorum is a nematode parasite of sylvan and domestic species of the family Canidae. It has a broad but patchy distribution worldwide, and there is evidence for geographical spread and increasing incidence of infection in recent years. While historically Angiostrongylus-like nematodes identified in dogs and foxes have been described as A. vasorum in Europe and Angiocaulus raillieti in South America, more recent taxonomic revision has amalgamated these into a single species, A. vasorum. Here we report, for the first time, the molecular characterization of isolates of A. vasorum from Germany, Portugal, Denmark and the United Kingdom on the basis of the mitochondrial COI gene and the second ribosomal internal transcribed spacer. When compared with isolates from Brazil, sequence analysis revealed 2 distinct genotypes. Estimated rates of evolution based on COI sequences for both nematode and host are consistent with the hypothesis that the presence of A. vasorum in South America is a result of an ancient evolutionary event. Angiostrongylus vasorum in South America potentially represents a separate species to that observed in Europe.

Keywords

Angiostrongylus vasorumAngiocaulus raillietiBrazilco-evolutionCOIdogEuropefoxITS-2nematodephylogenetics
Type
Research Article
Information
Parasitology , Volume 136 , Issue 1 , January 2009 , pp. 107 - 115
Copyright
Copyright © 2009 Cambridge University Press

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