Article: A PARASITE THAT CAUSES FISH DISEASE HITS STATE.(News)

A parasite that causes young trout to chase their tails until they die or are eaten by predators has shown up for the first time in Washington.

The parasite that causes whirling disease was recently detected in fish from the Grande Ronde River near Asotin and likely migrated north from Oregon, state officials said recently.

Although they are carrying the parasite, Washington fish haven't yet developed the disease, which is blamed for decimating some rainbow trout populations in Montana.

California, Colorado, Idaho and Oregon also have reported the disease, although it hasn't caused many problems in those states, the state Department of Fish and ...

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