General Information

Event name: US-14-003
Nature of the harmful event:
Seafood toxins
Event directly affected:
Other Terrestrial , Shellfish
Toxicity detected: Yes (Approximate range: n Jefferson County, 12,688 micrograms of PSP toxins in blue mussels, 3,243 of PSP toxins in pacific oysters (a new record in oysters in WA) and 1,744 of PSP toxins in manila clams on 9/23/14 and varnish clams had 616 micrograms of PSP toxin on 10/20/14 in Quilcene Bay. In Kitsap County, geoduck from Manzanita tract reached a maximum of 566 micrograms of PSP toxins on 10/20/14.)
Associated syndrome: ASP , DSP , PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector): PSP- Blue mussels, pacific oysters, manila clams, littleneck clams, butter clams, varnish clams and geoduck clams. DSP- Blue mussels.
Report the outcome of a monitoring programme: Yes (Marine Biotoxin Program at the Washington State Department of Health, Office of Environmental and Health and Safety.)
Event occurred before in this location: Yes (PSP closures have occurred throughout Central Puget Sound previously. 2014 was the first year where a DSP closure was recorded in Grays Harbor (coastal bay).)
Individuals to contact: BORCHERT, Jerry , HARD, Clara

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: There were several recreational shellfish closures in Kitsap, King and Jefferson Counties due to PSP.
Bloom event dates (yyyy/mm/dd):
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: Yes
Causative Species/Genus: Alexandrium catenella ( cells/L)
Pseudo-nitzschia spp. ( cells/L)
Dinophysis spp. ( 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: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
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 12688g Bioassay-Mouse
Pacific Oysters Saxitoxins 3243g Bioassay-Mouse
Manila Clams Saxitoxins 1744g Bioassay-Mouse
Varnish Clams Saxitoxins 616g Bioassay-Mouse
Geoduck Clams Saxitoxins 566g Bioassay-Mouse
Butter Clams Saxitoxins 206g Bioassay-Mouse
Blue Mussels Okadaic Acid 19mg LC-MS
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:
Created at 09:41 on 7 Feb 2017