General Information

Event name: US-98-023
Nature of the harmful event:
Seafood toxins
Event directly affected:
Shellfish , Humans
Toxicity detected: Yes
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
Individuals to contact: OSTASZ, Michael J.

Location & Date

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Location: Latitude: 57.958333, Longitude: -136.225000
General location information: Pelican, on Lisianski Inlet., Alaska.
HAB Area code(s): US-25
Additional location information: In NW part of Chicagof Island.
Bloom event dates (yyyy/mm/dd): Event Date:1998-11-13
Start: 1998-11-13,
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: Small inlet (closed)

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: No Type of kit used:
Additional information:
Economic losses:
Management decision: N/A.
Additional harmful effect information: Numbness and tingling in mouth and around face and lips. Felt nauseated and vomited several times. Patient had dug and consumed two, large platefuls of fried butterclams. Littleneck clams were eateng previously and all were asymptomatic.