Effect of experimental exposure to differently virulent Aphanomyces astaci strains on the immune response of the noble crayfish Astacus astacus

Becking, Thomas; Mrugała, Agata; Delaunay, Carine; Svobodá, J.; Raimond, Maryline; Viljamaa-Dirks, Satu; Petrusek, Adam; Grandjean, Frédéric; Braquart‐Varnier, Christine

doi:10.1016/j.jip.2015.08.007

Cited by 39 publications

(22 citation statements)

References 38 publications

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“…; or the Ponto–Caspian region: Becking et al . ) may be regarded as evidence for this hypothesis. However, latent infections in which genotype group B was involved have also been reported (Svoboda et al .…”

Section: Hosts and The Genetic Variation Of Aphanomyces Astacimentioning

confidence: 90%

Hosts and transmission of the crayfish plague pathogen Aphanomyces astaci: a review

Svobodá

Mrugała

Kozubíková‐Balcarová

et al. 2016

Journal of Fish Diseases

124

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The crayfish plague pathogen, Aphanomyces astaci Schikora, has become one of the most well-studied pathogens of invertebrates. Since its introduction to Europe in the mid-19th century, it has caused mass crayfish mortalities, resulting in drastic declines of local populations. In contrast, North American crayfish usually serve as latent carriers, although they may also be negatively affected by A. astaci infections under some circumstances. Recent research benefiting from molecular tools has improved our knowledge about various aspects of A. astaci biology. In this review, we summarize these advances, particularly with respect to the host range and transmission. We highlight several aspects that have recently received particular attention, in particular newly confirmed or suspected A. astaci hosts, latent A. astaci infections in populations of European crayfish, and the relationship between A. astaci genotype groups and host taxa.

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Section: Hosts and The Genetic Variation Of Aphanomyces Astacimentioning

confidence: 90%

Hosts and transmission of the crayfish plague pathogen Aphanomyces astaci: a review

Svobodá

Mrugała

Kozubíková‐Balcarová

et al. 2016

Journal of Fish Diseases

124

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“…Signal crayfish represents an ideal species to test the roles of genetic diversity and pathogens as novel weapons on invasion success, as the species is highly invasive throughout most of Europe, and Great Britain in particular. Its success has been attributed to preadaptation, aggressive behavior, niche plasticity, and the presence of the highly infectious A. astaci (Becking et al, 2015;Holdich, James, Jackson, & Peay, 2014;Hudina, Galić, Roessink, & Hock, 2011;James et al, 2014). Admixture between lineages could have also facilitated the establishment of this species, allowing populations to overcome founder effects and loss of genetic diversity (Kolbe et al, 2004;Rius & Darling, 2014), particularly when combined with high propagule pressure (Consuegra et al, 2011), but this had not been considered before.…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and parasite facilitated establishment of the invasive signal crayfish (Pacifastacus leniusculus) in Great Britain

Robinson

Leániz

James

et al. 2018

Ecology and Evolution

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Successful establishment of non‐native species is strongly influenced, among other factors, by the genetic variation of founding populations, which can be enhanced by multiple introductions through admixture. Coexisting pathogens can also facilitate the establishment of non‐native species by detrimentally impacting on the native fauna acting as novel weapons. The signal crayfish (Pacifastacus leniusculus) is a highly invasive species, which has caused mass declines of native crayfish in Europe through displacement and transmission of the oomycete Aphanomyces astaci (crayfish plague), which is typically lethal to native European crayfish. However, whether Aphanomyces astaci may have facilitated the invasion of the signal crayfish is not known. We estimated the genetic diversity at microsatellite DNA loci, effective population size, and potential origins of seven infected and noninfected signal crayfish populations in Europe and one founder population in North America. Approximate Bayesian computation analysis and population structuring suggested multiple host introductions from diverse source populations, as well as higher heterozygosity among infected than uninfected populations, which could reflect a fitness advantage. Low effective population size, moderate heterozygosity, and lack of isolation by distance suggest that some invasive signal crayfish populations may not be fully established or that their genetic diversity may have been reduced by eradication attempts.

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“…For example, Collas et al (2016) reported a disease front that was progressing upstream of 3 km in ten days during July based on surveys performed every two days. In crayfish experimentally infected by the plague, the death occurred within 7 to 10 days when virulent strains are involved (Becking et al 2015). Time to mortality is at least 3 to 10 times longer after infection by BBSV as infected specimens sampled on the 10 th of September 2018 and maintained in aquarium died respectively after 20 days, 35 days and 3 months.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A new bunya-like virus associated with mass mortality of white-clawed crayfish in the wild

et al. 2019

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We report the discovery of a new enveloped, spherical virus belonging to the Phenuiviridae family of negative ssRNA viruses associated with a massive outbreak in a French population of the endangered white-clawed crayfish Austropotamobius pallipes. We call this virus Bunya-like Brown Spot Virus (BBSV) and characterize it using transmission electronic microscopy, genome sequencing and clinical signs. Infected specimens show discolored brown spots on the cuticle. Using RNA-seq data we assembled a partial sequence for the L, M and S genome segments of BBSV. Phylogenetic analyses using all three segments show this virus is closely related to the Wenling crustacean virus 7 (China) and to a bunya-like virus found in feces of the European otter. Our survey of the mass mortality event indicates the virus is less virulent than the crayfish plague caused by Aphanomyces astaci. Overall, the discovery of BBSV provides a new important asset to monitor A. pallipes populations.

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Effect of experimental exposure to differently virulent Aphanomyces astaci strains on the immune response of the noble crayfish Astacus astacus

Cited by 39 publications

References 38 publications

Hosts and transmission of the crayfish plague pathogen Aphanomyces astaci: a review

Hosts and transmission of the crayfish plague pathogen Aphanomyces astaci: a review

Genetic diversity and parasite facilitated establishment of the invasive signal crayfish (Pacifastacus leniusculus) in Great Britain

A new bunya-like virus associated with mass mortality of white-clawed crayfish in the wild

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