Whirling disease confirmed in Kootenay Lake

Whirling disease confirmed in Kootenay Lake

Source: goldstreamgazette

12/9/2024

Credit: Kelsey Yates/Creston Valley Advance

The vulnerable waters and freshwater fisheries of British Columbia’s lakes and rivers are under threat from whirling disease.

Three trout samples taken from the southern arm of Kootenay Lake have tested positive for the condition. Whirling disease is caused by a parasite, Myxobolus cerebralis, that attacks the brain stem, spinal cord, and nervous tissue of juvenile salmonid fish. The disease causes an erratic "whirling" swimming pattern, deformities of the spine and jaw, and dark patches on the skin near the tail. It is not a health risk for humans or pets

When infected fish die, spores carrying the parasite spread into the water and seek out aquatic worms (hosts) to repeat the cycle. There is no treatment for whirling disease, so containment and prevention are the best course of action.

Kootenay Lake

Salmon, Kokanee

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