Interactive effects of metal contamination and pathogenic organisms on the marine bivalve Cerastoderma edule

Abstract : The present study evaluated the interactive effects of cadmium contamination and pathogenic organisms (trematodes Himasthla elongata and bacteria Vibrio tapetis) singularly and in combination during 7 days on the bivalve Cerastoderma edule. Some defense-related activities were analyzed such as genetic expression, metallothionein and immune responses. Trematode metacercarial infection, similar whatever the treatment, induced the strongest responses of immune parameters. Particularly, the interaction between cadmium and parasite exposures induced unusual responses on gene expression and immune responses. No effect of bacterial challenge appeared on bivalve responses, nevertheless a strong mortality of V. tapetis infected cockles occured between 7 and 14 days. Cadmium bioaccumulation was significantly modulated by both pathogenic organisms. Furthermore, an antagonistic effect of trematodes and bacteria was shown on metal bioaccumulation of co-infected cockles. These results highlighted the importance of considering the multiplicity of perturbation sources in coastal ecosystems to assess the health status of organisms.
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Marine Pollution Bulletin, Elsevier, 2010, 60 (4), pp.515-525. 〈10.1016/j.marpolbul.2009.11.013〉
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http://hal.univ-brest.fr/hal-00638234
Contributeur : Catherine Bertignac <>
Soumis le : vendredi 4 novembre 2011 - 13:02:39
Dernière modification le : jeudi 11 janvier 2018 - 06:23:42

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Ika Paul-Pont, Patrice Gonzalez, Nathalie Baudrimont, Florence Jude, Natalie Raymond, et al.. Interactive effects of metal contamination and pathogenic organisms on the marine bivalve Cerastoderma edule. Marine Pollution Bulletin, Elsevier, 2010, 60 (4), pp.515-525. 〈10.1016/j.marpolbul.2009.11.013〉. 〈hal-00638234〉

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