Enhancement of protozoan pathogen Perkinsus marinus infections in American oysters Crassostrea virginica exposed to the chemical carcinogen n-nitrosodiethylamine (DENA)

1 January 1988

journal article
research article
Published by Inter-Research Science Center in Diseases of Aquatic Organisms

Vol. 5 (3) , 205-213
https://doi.org/10.3354/dao005205

Abstract

American oysters Crassostrea virginica exposed to high concentrations (600 mg l-1) of n-nitrosodiethylamine (DENA) during winter (February to May) showed significant enhancement of an epizootic apicomplexan parasite, Perkinsus marinus. The parasite reproduced and caused atypical lesions in exposed oysters in water temperatures at its lower range (20.degree. C). The reasons for this enhancement are not clear but may reflect damage to the oxysters nonspecific, cellular defense mechanisms by the DENA without concomitant negative effects on the parasite.

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