General Information

Event name: US-05-029
Nature of the harmful event:
Seafood toxins
Event directly affected:
Toxicity detected: Yes
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): Blue mussels, geoduck clams, manila clams, pacific oysters
Report the outcome of a monitoring programme: Yes (WA Dept. of Health, Office of Shellfish and Water protection, marine biotoxin monitoring program)
Event occurred before in this location: Yes (Most of the inlets of central puget sound have had previous psp closures.)
Individuals to contact: COX, Frank

Location & Date

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Location: Latitude: , Longitude:
General location information: Washington state, central puget sound, Pacific Northwest
HAB Area code(s): US-24
Additional location information: King County - Cashon Is. and Maury Is. including Quartermaster Harbor closed on 7/1/05. All king co. closed on 7/21/05. Kitsap county - port madison and blake island closed on 6/21/05, east bainbridge closed on 6/23/05, port wa. Narrows closed on 7/13/05. All east kitsap co. closed on 7/26/05. Pierce county - commencement bay closed on 7/22/06, snohomish co.- picnin pt. south to king co. line closed on 7/26/05.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: King Co. 6/21/05 -- 10/7/05, Kitsap Co. 6/23/05 -- 10/7/05, Pierce Co. 7/22/05 -- 9/21/05, Snohomish Co. 7/26/05 -- 8/24/05..


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 Saxitoxins 1658 microgram/100 g Bioassay-Mouse
Geoduck, Manila Clams, Pacific Oysters Saxitoxins " Bioassay-Mouse
Kit used: No Type of kit used:
Additional information:
Economic losses: Recreational and commercial shellfish harvest seasons were interrupted, causing an economic loss to the Central Puget Sound Washington communities.
Management decision: DOH closed shellfish harvesting at impacted areas to protect public health.
Additional harmful effect information: