Histopathological survey for parasite groups in Gammarus varsoviensis (Amphipoda)

Daniel Warren, Amy Burgess, Felix Karemera, Karolina Bacela-Spychalska, Grant Stentiford, Jamie Bojko

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Invasive non-native amphipods (Crustacea) are becoming a model system in which to explore the impact and diversity of invasive parasites - parasites that are carried along an invasion route with their hosts. Gammarus varsoviensis is a freshwater amphipod species that has a recently explored invasion history. We provide a histopathological survey for a putatively invasive non-native population of this amphipod, identifying 8 symbiotic groups: Acanthocephala, Rotifera, Digenea, ciliated protozoa, Haplosporidia, Microsporidia, ‘Candidatus Aquirickettsiella’, and a putative nudivirus, at various prevalence. Our survey indicates that the parasites have no sex bias and that each has the potential to be carried in either sex along an invasion route. We discuss the pathology and prevalence of the above symbiotic groups, and whether those that are parasitic may pose a risk if G. varsoviensis were to carry them to novel locations.
Original languageEnglish
Pages (from-to)47-51
Number of pages5
JournalDiseases of Aquatic Organisms
Publication statusPublished - 5 May 2022


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