Paralytic shellfish poisoning, or PSP, is caused by saxitoxin, a naturally occurring toxin that's produced by algae. Saxitoxin is a neurotoxin, meaning it can damage nerve tissue. People who eat ...

“Paralytic shellfish poisoning typically occurs from ingesting ... which can produce saxitoxin, a neurotoxin, added Vera Trainer, PhD, marine program director and research scientist at the ...