perspectives on the diagnosis, epizootiology, and control of the 1973 duck plague epizootic in wild waterfowl at lake andes, south epizootic of duck plague occurred in early 1973 in a population of 163,500 wild waterfowl, primarily mallards (anas platyrhynchos), wintering on lake andes and the nearby missouri river in southeastern south dakota (usa). the diagnosis was based on pathologic lesions and confirmed by virus isolation. control measures included quarantine, attempts to reduce virus contamination of the area, dispersal of waterfowl, and monitoring of wild waterfowl populations for mortality. the epizootic resulte ...19979391953
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