title: Cross-effects of nickel contamination and parasitism on zebra mussel physiology.
abstract: Aquatic organisms are exposed to pollution which may make them more susceptible to infections and diseases. The present investigation evaluated effects of nickel contamination and parasitism (ciliates Ophryoglena spp. and intracellular bacteria Rickettsiales-like organisms), alone and in combination, on biological responses of the zebra mussel Dreissena polymorpha, and also the infestation abilities of parasites, under laboratory controlled conditions. Results showed that after 48 h, more organisms were infected in nickel-exposed groups, which could be related to weakening of their immune system. Acting separately, nickel contamination and infections were already stressful conditions; however, their combined action caused stronger biological responses in zebra mussels. Our data, therefore, confirm that the parasitism in D. polymorpha represents a potential confounding factor in ecotoxicological studies that involve this bivalve.
authors.affiliation: Université Paul Verlaine-Metz, Laboratoire des Interactions, Ecotoxicologie, Biodiversité, Ecosystèmes (LIEBE), CNRS UMR 7146, Metz, France.
authors.forename: Laëtitia
authors.initials: L
authors.lastname: Minguez
authors.forename: Anatole
authors.initials: A
authors.lastname: Boiché
authors.forename: Sophie
authors.initials: S
authors.lastname: Sroda
authors.forename: Sergey
authors.initials: S
authors.lastname: Mastitsky
authors.forename: Nelly
authors.initials: N
authors.lastname: Brulé
authors.forename: Jonathan
authors.initials: J
authors.lastname: Bouquerel
authors.forename: Laure
authors.initials: L
authors.lastname: Giambérini
mesh_terms: D020561:Alphaproteobacteria / Q000472:pathogenicity; D000818:Animals; D016798:Ciliophora / Q000472:pathogenicity; D016770:Ciliophora Infections / Q000662:veterinary; D049875:Dreissena / Q000187:drug effects* / Q000378:metabolism / Q000469:parasitology*; D041981:Gastrointestinal Tract / Q000187:drug effects / Q000469:parasitology / Q000473:pathology; D016905:Gram-Negative Bacterial Infections / Q000662:veterinary; D006458:Hemolymph / Q000166:cytology / Q000187:drug effects / Q000469:parasitology; D006790:Host-Parasite Interactions / Q000187:drug effects*; D009532:Nickel / Q000633:toxicity*; D059208:Parasite Load; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D014876:Water Pollution
chemical_list: D014874:Water Pollutants, Chemical; D009532:Nickel
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