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Apparent interspecific transmission of Aphanomyces astaci from invasive signal to virile crayfish in a sympatric wild population

James, J, Mrugala, A, Oidtmann, B, Petrusek, A and Cable, Joanne 2017. Apparent interspecific transmission of Aphanomyces astaci from invasive signal to virile crayfish in a sympatric wild population. Journal of Invertebrate Pathology 145 , pp. 68-71. 10.1016/j.jip.2017.02.003

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Abstract

The crayfish plague pathogen (Aphanomyces astaci) causes mass mortalities of European crayfish when transmitted from its original North American crayfish hosts. Little is known, however, about interspecific transmission of the pathogen between different American crayfish species, although evidence from trade of ornamental crayfish suggests this may happen in captivity. We screened signal and virile crayfish for A. astaci at allopatric and sympatric sites in a UK river. Whilst the pathogen was detected in signal crayfish from both sites, infected virile crayfish were only found in sympatry. Genotyping of A. astaci from virile crayfish suggested the presence of a strain related to one infecting British signal crayfish. We conclude that virile crayfish likely contracted A. astaci interspecifically from infected signal crayfish. Interspecific transmission of A. astaci strains differing in virulence between American carrier species may influence the spread of this pathogen in open waters with potential exacerbated effects on native European crayfish.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Uncontrolled Keywords: Pacifastacus leniusculus; Orconectes cf. virilis; Wildlife disease; Transmission pathways
Publisher: Elsevier
ISSN: 0022-2011
Date of First Compliant Deposit: 22 February 2017
Date of Acceptance: 15 February 2017
Last Modified: 19 Feb 2018 04:49
URI: http://orca.cf.ac.uk/id/eprint/98461

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