PAUL-PONT, Ika; GONZALEZ, Patrice; BAUDRIMONT, Magalie; JUDE, Florence; RAYMOND, Natalie; BOURRASSEAU, Line; LE GOIC, Nelly; HAYNES, Frances; LEGEAY, Alexia; PAILLARD, Christine; DE MONTAUDOUIN, Xavier

doi:10.1016/j.marpolbul.2009.11.013

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PAUL-PONT, Ika
Environnements et Paléoenvironnements OCéaniques [EPOC]

GONZALEZ, Patrice

Environnements et Paléoenvironnements OCéaniques [EPOC]

BAUDRIMONT, Magalie

Environnements et Paléoenvironnements OCéaniques [EPOC]

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Marine Pollution Bulletin. 2010-01-01, vol. 60, n° 4, p. 515-525

Résumé en anglais

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.< Réduire

Mots clés en anglais

Cerastoderma edule

Metal

Parasite

Bacteria

Metallothionein

Immune response

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

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