Natural poison test (shell poison, blowfish poison)

Bivalves (scallops, purple mussels, clams, clams, oysters, etc.) eat toxic plankton (wort algae) in seawater to accumulate toxins and cause food poisoning caused by humans to eat it, or its causative substance is called shellfish poison.
Depending on the symptoms, it is classified into paralysis, diarrheal shellfish poisoning, nervous shellfish poison, and memory loss shellfish poison, etc.
Poisonous components include saxytoxin and okadaic acid.

The Food Sanitation Laboratory tests for paralyzed shellfish poisoning and diarrheal shellfish poisoning according to the timing of when shellfish become poisonous and toxic information from the production area.

About 30 minutes after eating, the lips, tongue, face, limbs, etc. are paralyzed.
If it is mild, it recovers in 24 to 48 hours.
In severe cases, symptoms such as motor disorders, headache, vomiting, speech disorders, and covelosion may occur, and if paralysis progresses, death may occur due to dyspnea.

Severe diarrhea is the main symptom and can also be accompanied by nausea, vomiting, and abdominal pain. There are no deaths.

Fugu poison is a powerful neurotoxin called tetrodotoxin, which is said to be about 1,000 times more toxic than potassium cyanide.
Poisoning symptoms caused by blowfish poison include numbness and vomiting in the lips and limbs about 1 to 3 hours after eating, and in the worst case, death occurs in about 8 hours.
The toxic parts vary depending on the type of blowfish, and there are individual differences. For this reason, it is very dangerous for amateurs to cook with half-hearted knowledge.
Food poisoning due to blowfish occurs every year, mostly due to amateur cooking at home. Eat blowfish in a shop with a professional qualified cook.

In Kanagawa Prefecture, blowfish provided at stores and restaurants is properly processed by a blowfish kitchen knife who has obtained a license to cook blowfish according to the "Kanagawa Fugu Handling and Sales Ordinance".
The Food Sanitation Laboratory conducts visual tests and toxicity tests for blowfish processed in the market to see if toxic parts have been removed.