General Information

Event name: US-98-027
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 278 g STXeq / 100 g.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes
Event occurred before in this location: Yes (General area has had problems with PSP episodes in the past.)
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: , Longitude:
General location information: Juneau, Outer Point., Alaska.
HAB Area code(s): US-25
Additional location information: Juneau, Outer Point, point of land on west tip of Douglas Island in Stepens Passage, 4 miles NW of Middle Point and 10 miles west of Juneau.
Bloom event dates (yyyy/mm/dd): Event Date:1998-04-30
Start: 1998-04-30,
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
Raw butter clams Saxitoxins STX eq 278 LC
Cooked butterclams Saxitoxins STX eq 212 LC
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: Press release warning about harvesting from unapproved areas.
Additional harmful effect information: One person seen in emergency room with symptoms in six hours of numbness of face and tongue, diarrhea, lightheaded, headache, numbness in fingers and toes and continued numbness of tongue of 1/5/98.