Université Paul Verlaine-Metz, Laboratoire des Interactions, Ecotoxicologie, Biodiversité, Ecosystèmes (LIEBE), CNRS UMR 7146, Metz, France.
Ecotoxicology. 2012 Mar;21(2):538-47. doi: 10.1007/s10646-011-0814-y. Epub 2011 Nov 12.
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.
水生生物会暴露在受污染的环境中，这可能使它们更容易受到感染和疾病的影响。本研究评估了镍污染和寄生（纤毛虫属和细胞内细菌立克次体样生物）单独和联合作用对斑马贻贝 Dreissena polymorpha 生物反应的影响，以及在实验室控制条件下寄生虫的侵染能力。结果表明，在 48 小时后，暴露在镍环境中的贻贝体内有更多的生物体被感染，这可能与它们免疫系统的削弱有关。单独作用时，镍污染和感染已经是应激条件；然而，它们的联合作用导致斑马贻贝产生更强的生物反应。因此，我们的数据证实，寄生在 D. polymorpha 体内的生物体是涉及这种双壳类动物的生态毒理学研究中的一个潜在混杂因素。
