A new discovery can make it far easier to check whether mussels have gone bad. Poisonous mussels contain the extremely dangerous and paralyzing neurotoxin saxitoxin. This neurotoxin is the cause of paralytic shellfish poisoning. The first symptoms include numbness in the mouth and lips, spreading to the face and neck. Then, the discomforts come in abundance: headache, dizziness, slurred speech and reduced motor function. The most serious poisonings can lead to fatal paralysis.
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