| diagnostic findings in the 1992 epornitic of neurotropic velogenic newcastle disease in double-crested cormorants from the upper midwestern united states. | neurotropic velogenic newcastle disease (nvnd) occurred in juvenile double-crested cormorants, phalacrocorax auritus, simultaneously in nesting colonies in minnesota, north dakota, south dakota, and nebraska and in lakes michigan, superior, huron, and ontario during the summer of 1992. mortality as high as 80%-90% was estimated in some of the nesting colonies. clinical signs observed in 4- to 6-wk-old cormorants included torticollis, tremors, ataxia, curled toes, and paresis or weakness of legs, ... | 1997 | 9087334 |