Neurotoxic shellfish poisoning

Revision as of 22:49, 6 January 2016 by Carpenj (talk | contribs) (Diagnosis)


  • Associated with red tide
  • Seen in Southeast US, Gulf of Mexico, Caribbean, New Zealand
  • Caused by brevetoxins secreted by dinoflagellates during algal blooms, which are then ingested by shellfish and/or aerosolized


  • Based on symptoms and history of ingesting shellfish or proximity to red tide
  • If ingested
    • Similar to ciguatera
    • GI symptoms - vomiting, diarrhea, abdominal cramping; usually within 30 minutes to 3 hours of ingestion
    • Neurologic symptoms - parethesias, dizziness, ataxia. Can also see hot/cold temperature sensation reversal
  • If inhaled
    • Upper respiratory tract irritation, rhinorrhea, bronchoconstriction

Differential Diagnosis

Marine toxins, envenomations, and bites


  • Symptomatic


See Also