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In mammals and shellfish, brevetoxins produced by the dinoflagellate Karenia brevis are rapidly metabolized to cysteine conjugates. These metabolites identified by mass spectrometry are produced in abundance in mammals and are potentially major bioactive products for intoxication. They are also abundant metabolites in shellfish where they are, in contrast to mammals, retained for prolonged periods,...
In Florida (USA), numerous cases of human ciguatera fish poisoning, as well as neurotoxic shellfish poisoning following consumption of local seafood products, have been reported. By using in parallel, the sodium channel receptor binding assay (RBA), and the ouabain/veratridine-dependent cytotoxicity assay (N2A assay), we established criteria to identify, detect, and quantify ciguatoxins in fish extracts,...
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