General Information

Event name: US-00-002
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 32-45 µg STXeq / 100 g.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Prototheca stominea and Cancer magister.
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes (General area has shown elevated levels of PSP in the past.)
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: 57.133333, Longitude: -135.375000
General location information: Sitka, Starrigavan Bay., Alaska.
HAB Area code(s): US-25
Additional location information:
Bloom event dates (yyyy/mm/dd): Event Date:2000-06-04
Start: 2000-06-04, End: 2000-06-04
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium sp. ( cells/L)
Co-Ocurring Species/Genus:
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: No Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity: 0
Nutrient information:
Temperature Range During Event: Max: °C, Min: °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information:

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Cancer magister Saxitoxins STX eq 32 - 33 Bioassay-Mouse
Prototheca stominea Saxitoxins STX eq 45 Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision:
Additional harmful effect information: 1 person came down with perioral numbness and tingling, nausea, and tongue felt ‘numb’. Patient was given charcoal and stomach lavage and admitted to hospital for care and observation. Patient had eaten 8-10 uncooked littleneck (Prototheca staminea) clams