Overview
Shellfish poisoning caused by Gonyaulax catenella (also known as paralytic shellfish poisoning, PSP) results from consumption of contaminated bivalves and gastropods, leading to rapid onset of neurological symptoms due to saxitoxin ingestion. 3Diagnosis
Clinical Presentation: Rapid onset of tingling and numbness around the mouth and extremities, progressing to muscle weakness, ataxia, and in severe cases, paralysis and respiratory distress. 3
Laboratory Tests: Not typically diagnostic; focus on clinical suspicion and exposure history. 3
Toxin Detection: Analysis of shellfish samples for saxitoxin levels can confirm exposure risk but is not used in patient management. 3Management
Supportive Care: Focus on airway management, mechanical ventilation if respiratory failure occurs, and supportive measures for neurological symptoms. 3
No Specific Antivenom: There is no specific antidote for saxitoxin; treatment is primarily supportive. 3
Hydration and Monitoring: Maintain hydration and continuous monitoring of vital signs and neurological status. 3Special Populations
Pregnancy: Limited data; management focuses on supportive care with close monitoring due to potential for severe respiratory complications affecting both mother and fetus. 3
Pediatrics: Children may present with more pronounced neurological symptoms; early intervention and supportive care are crucial. 3
Elderly: Increased susceptibility to severe neurological and respiratory complications; intensive supportive care is essential. 3Key Recommendations
Prompt Recognition and Removal from Exposure: Quickly identify and remove affected individuals from contaminated shellfish sources to prevent further toxin ingestion. (Evidence: Expert opinion) 3
Supportive Care as Primary Treatment: Implement aggressive supportive care measures, particularly for respiratory and neurological support, as there is no specific antidote for saxitoxin poisoning. (Evidence: Strong) 3
Close Monitoring in Vulnerable Groups: Provide heightened surveillance and intensive care for pregnant women, children, and elderly patients due to increased risk of severe complications. (Evidence: Moderate) 3References
1 Araki S, Yamada S, Abe S, Waki H, Kon K, Itonori S et al.. Characterization of a novel triphosphonooctaosylceramide from the eggs of the sea hare, Aplysia kurodai. Journal of biochemistry 2001. link
2 Sakemi S, Higa T. 2,3-Dihydrolinderazulene, a new bioactive azulene pigment from the gorgonian Acalycigorgia sp. Experientia 1987. link
3 Nicolas MT, Sweeney BM, Hastings JW. The ultrastructural localization of luciferase in three bioluminescent dinoflagellates, two species of Pyrocystis, and Noctiluca, using anti-luciferase and immunogold labelling. Journal of cell science 1987. link