OBSERVATIONS ON WATERFOWL MORTALITY IN SOUTHERN MANITOBA CAUSED BY ECHINURIA UNCINATA (NEMATODA, ACUARIIDAE)

Abstract

An outbreak of echinuriasis caused by the nematode Echinuria uncinata is reported in the ducks and swans of southern Manitoba. Treatment in trumpeter swan cygnets with piperazine citrate was attempted. Symptoms and lesions characteristic of chronic echinuriasis are described. Ecological factors of this disease, and its possible association with drought are discussed. New host records for Echinuria uncinata are Anas discors, Aythya valisineria, and Olor buccinator.