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CUMBERLAND, Md. (AP) - State fishery workers unwittingly spread a fatal fish illness by moving diseased fish from one facility to another, officials said.
The state Department of Natural Resources previously said the parasite that causes whirling disease, which is fatal to some trout, might have been spread by mud on the feet of birds or bears.
The agency's discovery of the parasite at rearing stations in Garrett County in January prompted the destruction of more than 80,000 rainbow and brown trout that had been earmarked for stocking this spring in Maryland lakes and streams.
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