Harmful Algal Information System: Event US-22-019

General Information

Event name:	US-22-019
Country:	UNITED STATES
Nature of the harmful event:	High Phyto concentration , Seafood toxins
Event directly affected:	Shellfish , Humans
Toxicity detected:	Yes (Approximate range: 30-55 micrograms/100 grams shellfish tissue)
Associated syndrome:	DSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):	DSP Toxins: Blue mussel Geoduck Manila clam Pacific oyster
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
Individuals to contact:	BORCHERT, Jerry , BARRY, Tracie

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Washington State, Strait of Juan de Fuca and Bays, HAB Area code(s): US-24
Additional location information:	DSP closures begin in Sequim Bay and Discovery Bay in June. DSP exceeded action levels in oysters, manila clams and mussels beginning 6/8/22. Closure for DSP was extended by PSP toxicity.
Bloom event dates (yyyy/mm/dd):	Event Date:2022-06-08
Quarantine levels dates (yyyy/mm/dd):	End: 2022-08-30
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	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:

Growth Comments

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Blue Mussels	Okadaic Acid		55 �g/100g tissue	LC
Geoduck Clams	Okadaic Acid		39 �g/100g	LC
Manila Clams	Okadaic Acid		30 �g/100g	LC
Pacific Oysters	Okadaic Acid		32 �g/100g	LC

Kit used: No

Type of kit used:

Additional information:

Economic losses:

Recreational, commercial and Tribal ceremonial and subsistence shellfish harvests were interrupted, causing cultural and economic loss to Strait of Juan de Fuca Washington communities

Management decision:

WADOH closed shellfish harvesting at impacted areas to protect public health.

Additional harmful effect information:

No human/animal illnesses reported.

Created at 01:18 on 6 Apr 2023