This is some and part of mine research...
Paralytic shellfish poisoning toxins (PSP)....very important
The toxins in shellfish most commonly associatiated with PSP consist of around 20 closely related compounds. These toxins are of three types: Carbomate; N-sulphocarbamoyl; and decarbomoyl toxins.
Nature and severity of PSP toxins vary with the quantity of toxins ingested and proportions of the individual toxins involved. Effects of PSP toxins on humans are well established. the most common symptoms following ingestion are paraesthesia of the perioral region, tongue and limbs, with ataxia, lower back pain and a sensation of consciousness and respiratory failure can occur whcih may be fatal in the absence of respiratory support.
Standard acceptale limit in regulations is 80microgram/100g
The maximum permitted limit of PSP toxins in bivalve molluscs has been subject to specific legislation in the form of The FOos Safety (LIve Bivelve Molluscs) Regulation 1992 (S.I. [1992] No. 3164). under the regulations, ' the total concentration of PSP toxins in the edible parts of molluscs must not exceed 80microgram/100g of molluscs flesh'.
Analysis of PSP toxins can be through the mouse bioassay method
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