General Information

Event name: US-02-022
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 1,773 g STXeq /100 g.)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (WA Dept. of Health, office of Food Safety & Shellfish Programs, Marine Biotoxin Monitoring Program)
Event occurred before in this location: Yes (Some of the inlets of South Puget Sound have had previous PSP closures.)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Carr Inlet, Case Inlet, Eld Inlet, Pickering, Washington.
HAB Area code(s): US-24
Additional location information: Pacific Northwest, South Puget Sound. Carr Inlet, Case Inlet, Eld Inlet, Pickering Passage, Nisqually Reach are areas that closed and had a previous history of PSP Closures.
Bloom event dates (yyyy/mm/dd): Start: 2002-10-25, End: 2003-02-21
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: Recreational shellfish closures began in October, 2002. The commercial closures began on november 6, 2002 and were not lifted until February 21, 2003, while some recreational closures continue to remain closed for Butter Clam only.


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( 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: Yes 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
Blue mussels (11/19/02) Saxitoxins STX eq 1,773 Bioassay-Mouse
Geoduck, Manila Clams, Pacific Oysters Saxitoxins STX eq Bioassay-Mouse
Kit used: No Type of kit used:
Additional information: Blue Mussels were the most toxic specie.
Economic losses: Recreational and commercial shellfish harvest seasons were interrupted, causing an economic loss to the South Puget Sound Washington communities.
Management decision: DOH closed shellfish harvesting at impacted areas to protect public health.
Additional harmful effect information: