Pasteurella anatipestifer was isolated from five of seven juvenile whistling swans found sick or dead on two lakes in Saskatchewan, during the 1973 autumn migration. More than 100 sick or dead birds had been reported on one of these lakes. Pathologic lesions were similar to those reported in Pasteurella anatipestifer infection in other species of waterfowl. The possible epizootiology of the disease is discussed.
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