Comparative Toxicity and Paralytic Shellfish Poisoning Toxin Profiles in the Mussel Mytilus galloprovincialis and the Oyster Crassostrea gigas Collected from a Mediterranean Lagoon in Tunisia: A Food Safety Concern

Author：

Publisher： Taylor & Francis Ltd

E-ISSN： 1532-2386|18|5|1075-1085

ISSN： 1094-2912

Source： International Journal of Food Properties, Vol.18, Iss.5, 2015-05, pp. : 1075-1085

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Abstract

Edible shellfish Mytilus galloprovincialis and Crassostrea gigas have been investigated for the paralytic shellfish poisons using mouse bioassay and high performance liquid chromatography with fluorescence detection. Paralytic shellfish poisons toxins were detected in mussels and oysters from September 2007 to May 2008. The level of paralytic shellfish poisons toxins in mussels reached the maximum in November with 832.9 μg saxitoxin-eq/100 g tissue. In oysters, toxins were detected with a maximum of 11.2 μg saxitoxin-eq/100 g tissue. The toxin high performance liquid chromatography profiles in mussels and oysters revealed the dominance of gonyautoxin 5 and N-sulfocarbamoyl-gonyautoxin-2 and -3 (C1-2), whereas GTX1-4, saxitoxin, and neosaxitoxin were found at low amounts. Overall, levels of paralytic shellfish poisons toxins were 20–70 times greater in mussels than in oysters. This is the first report on the qualitative and quantitative paralytic shellfish poisons content of M. galloprovincialis and C. gigas from a shellfish farming lagoon in Tunisia.