By Peninsula Daily News and
Associated Press
news sources
HOOD CANAL —
Marine biotoxins that cause diarrheic shellfish poisoning (DSP) have been detected in high levels in shellfish samples taken from the Seabeck area on Hood Canal in Kitsap County.
As a result, the state Department of Health and the Kitsap Public Health District have now closed waters on Hood Canal from Tekiu Point north to Naval Station Bangor to recreational shellfish harvesting for all species of clams, oysters and mussels.
Samples of mussels collected on Oct. 15 from Seabeck Marina contained DSP toxin concentrations of 16 micrograms per 100 grams of shellfish tissue. Shorelines are closed to harvesting when toxin levels exceed 15 micrograms per 100 grams of tissue.
This closure follows similar shutdowns this summer in Hood Canal in Jefferson County, including Quilcene and Dabob bays, plus beaches from Seal Rock Campground south to the Mason County line, according to Jim Zimny of the Kitsap Public Health District.
Diarrhetic shellfish poison, or DSP, is produced by a plankton that has been present in Puget Sound for decades, but illness from the poison had not been documented in the United States until last year when three people got sick after eating shellfish from Sequim Bay.
Last year, 63 people in southern British Columbia became sick, and their illness was later linked to mussels containing high levels of DSP.
Shrimp and crabs are not included in either biotoxin closure, but crabs should be cleaned with the “crab butter” discarded. Shellfish harvested commercially are tested for the toxin before they are distributed to stores and restaurants
PSP closure
An existing paralytic shellfish poison (PSP) closure for all species of shellfish remains in effect from the Hood Canal Bridge on the western shoreline of Kitsap County north to Foulweather Bluff and on the eastern shoreline of Kitsap County from Foulweather Bluff south to the Pierce County line including all bays and inlets.
Warning signs have been posted at public beaches alerting people not to collect shellfish from the closure areas.
Marine biotoxins are not destroyed by cooking or freezing and can be life-threatening.
People can become ill from eating shellfish contaminated with the naturally occurring marine algae that contains toxins that are harmful to humans.
DSP symptoms can begin from 30 minutes to 12 hours after eating contaminated shellfish causing nausea, vomiting, abdominal pain, and diarrhea, with diarrhea being the most commonly reported symptom. Most symptoms subside within 72 hours.
In most cases, the algae that contain the toxins cannot be seen and must be detected using laboratory testing. Kitsap Public Health will continue to monitor shellfish at Kitsap County beaches, and notify the public if the levels of toxin become unsafe in other areas.
For current shellfish closures within Kitsap County, call our hotline number at 1-800-2BEWELL, or click on http://www.kitsappublichealth.org.
For closures in other areas of Washington, call the state Department of Health’s Red Tide Hotline at 1-800-562-5632, or visit http://www.doh.wa.gov.
