Shellfish toxin poisoning Names of toxins included Examples of causative algal species
Images of species
Syndromes
Paralytic Shellfish Poisoning (PSP) Saxitoxin, Gonyautoxins, N-Sulfocarbamoyl toxins (C-toxins) Alexandrium spp.,
Gymnodinium catenatum
A. catenella
Gymnodinium catenatum
Numbness of the lips, tongue or limbs, headache and dizziness commonly occur within 30 minutes after consumption, no lasting effect when recovered.
Extreme case: muscular paralysis' pronounced respiratory difficulty; choking sensation; death through respiratory paralysis may occur within 2 - 24 hours after ingestion.
Diarrhetic Shellfish Poisoning (DSP) Okadaic acids, dinophysistoxins, pectenotoxins, yessotoxins Dinophysis spp., Prorocentrum spp.


D. acuminata

Diarrhoea, nausea, vomiting, abdominal pain within a few hours. Complete recovery is expected within three days.
Extreme case: Chronic exposure may promote tumour formation in the digestive system.
Neurotoxic Shellfish Poisoning (NSP) Brevetoxin K. papilionacea

K. papilionacea
Chills, headache, diarrohea; muscle weakness, muscle and joint pain; nausea and vomiting within 3-6hrs.
Extreme case: Paraesthesia: altered perception of hot and cold, difficulty in breathing, double vision, trouble in talking and swallowing.
Amnesic Shellfish Poisoning (ASP) Domoic acids Pseudo-nitzschia spp.

P. pseudodelicatissima
Nausea, abdominal cramps, vomiting, diarrhea within 3-5hrs.
Extreme case: Decreased reaction to deep pain, dizziness, hallucination, confusion; short term memory loss; seizures.