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Paralytic shellfish poisoning in south eastern Tasmania.

Paralytic shellfish poisoning (PSP) is a public health risk worldwide, resulting from the consumption of seafood that has bioaccumulated toxins produced by microalgae. Bivalve shellfish (such as mussels, clams, oysters and scallops) pose a particularly high risk as they feed by filtration, providing a method of toxin accumulation. Algae responsible for causing PSP include several species of the genus Alexandrium, Pyrodinium bahamense, and Gymnodinium catenatum. Paralytic shellfish toxins (PST) have been recorded in shellfish from Victoria, South Australia, New South Wales and Tasmania (data from state shellfish regulatory programs).