Diarrhetic Shellfish Poison Group (DSP) toxins encountered in shellfish include ocaic acid group toxins, pektenotoxin produced by dinophysis species and yessotoxin produced by prorocentrum species. The toxins of the ocadaic acid group are the dinophysis toxins DTX1, DTX2, DTX4 and the acyl derivatives DTX3.

However, there are other new types of toxic in recent years. 75 percent of the species proven to be toxic are classified as dinophyceae. There are four species in terms of toxic reproduction. One of these species is synophysis.

According to the classifications, Diarrhetic Shellfish Poison Group (DSP) is defined as diarrheal, ie, poisons of shellfish that cause diarrhea. The toxins that cause this poisoning are ocaic acid and dinophysis toxins, pektenotoxin and yessotoxins. These toxins cause diarrhea, nausea, vomiting, abdominal pain and chronic contractions in humans.

In 2011, the Ministry of Food, Agriculture and Livestock issued the Special Hygiene Regulations for Animal Foods. This regulation describes the total limit values ​​of marine biotoxins measured in the bodies or edible parts of shellfish. Accordingly, the sum of the ocadaic acid, dinophysis and pecteno toxins must not exceed the limit value of 160 µg / kg as the equivalent of ocaic acid.

Among the analyzes performed in authorized laboratories within the scope of biotoxin analyzes, briefly, LC-MS / MS liquid chromatography - mass - mass spectrometry method and Diarrhetic Shellfish Poison Group (DSP) intoxication analysis of ocaic acid analysis are also performed. These analyzes are based on standards and test methods published by domestic and foreign organizations. The standard considered in this respect is:

• TS EN 16204 Foodstuffs - Determination of lipophilic algae toxins in shellfish and shellfish by LC-MS / MS (octadaic acid toxins, yessotoxins, azaspiracids, pectonotoxins)