Correct!
5. Neurotoxic shellfish poisoning
Less common symptoms of neurotoxic shellfish poisoning include bradycardia, mydriasis, motor weakness and decreased reflexes. Brevetoxin can also be inhaled from sea spray causing rhinorrhea and bronchoconstriction. It can kill fish, invertebrates, seabirds and marine mammals such as manatees (1). Brevetoxins and their metabolites are lipid soluble and easily cross the blood brain barrier. Brevetoxins are tasteless and not diminished or removed by cleaning, cooking or freezing. The other answers above can cause bradycardia but are less likely given this patient's clinical presentation.
How do you diagnose neurotoxic shellfish poisoning? (Click on the correct answer to be directed to the fourth of six pages)