Harmful Algal Information System: Event US-98-027

General Information

Event name:	US-98-027
Country:	UNITED STATES
Nature of the harmful event:	Seafood toxins
Event directly affected:	Shellfish
Toxicity detected:	Yes (Approximate range: 278 痢 STXeq / 100 g.)
Associated syndrome:	PSP
Unexplained toxicity:	No
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme:	Yes
Event occurred before in this location:	Yes (General area has had problems with PSP episodes in the past.)
Individuals to contact:	OSTASZ, Michael J.

Location & Date

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Location:	Latitude: , Longitude:
General location information:	Juneau, Outer Point., Alaska. HAB Area code(s): US-25
Additional location information:	Juneau, Outer Point, point of land on west tip of Douglas Island in Stepens Passage, 4 miles NW of Middle Point and 10 miles west of Juneau.
Bloom event dates (yyyy/mm/dd):	Event Date:1998-04-30 Start: 1998-04-30,
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:

Microalgae

Causative organism known:	Yes
Causative Species/Genus:	Alexandrium sp. ( 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:	No	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:

Growth Comments

Additional Environmental information:

Toxin Assay Information

Species containing the toxin	Toxin type	Toxin details	Max. concentration	Assay type
Raw butter clams	Saxitoxins	STX eq	278	LC
Cooked butterclams	Saxitoxins	STX eq	212	LC

Kit used: No

Type of kit used:

Additional information:

Economic losses:

Management decision:

Press release warning about harvesting from unapproved areas.

Additional harmful effect information:

One person seen in emergency room with symptoms in six hours of numbness of face and tongue, diarrhea, lightheaded, headache, numbness in fingers and toes and continued numbness of tongue of 1/5/98.