General Information

Event name: US-22-001
Nature of the harmful event:
High Phyto concentration , Seafood toxins
Event directly affected:
Toxicity detected: Yes (Approximate range: 160 μg/100 g shellfish tissue)
Associated syndrome: PSP
Unexplained toxicity: No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: Yes (Oregon Department of Agriculture annual biotoxin monitoring program for molluscan shellfish)
Event occurred before in this location: Yes (Common bloom)
Individuals to contact: Manderson, Alex

Location & Date

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Location: Latitude: , Longitude:
General location information: North Oregon Coast, 22
HAB Area code(s): US-22
Additional location information:
Bloom event dates (yyyy/mm/dd): Start: 2022-07-01,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information: A mussel quarantine extended into 2023


Causative organism known: Yes
Causative Species/Genus: Algirosphaera 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
California Mussels Saxitoxins 160 g/100g tissue Bioassay-Mouse
Kit used: Type of kit used:
Additional information:
Economic losses: Loss of tourism and recreational harvests
Management decision: A closure from July 2022 into 2023
Additional harmful effect information:
Created at 07:09 on 31 Mar 2023