White-spot disease of salmon fry
White-spot disease, sometimes referred to as coagulated-yolk disease, has been associated with excessive mortalities occurring among the fry and early fingerling stages of the fall chinook salmon ( Oncorhynchus tshawytacha ) at the U.S. Fish-Cultural Stations at Carson, Cook, Underwood, and Willard, Washington. This disease of eggs and fry should not be confused with the "white-spot" infection that is caused in fingerlings by members of the protozoan genus Ichthyophthirius .
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