| 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 |
| the 1992 epizootic of newcastle disease in double-crested cormorants in north america. | in the summer of 1992, morbidity and mortality in juvenile double-crested cormorants (phalacrocorax auritus; dcc) attributable to newcastle disease virus (ndv) was observed for the first time in seven northern usa states and one canadian province, and recurred in three western canadian provinces. based on clinical signs and laboratory diagnostic findings, dcc mortality from ndv occurred in 59 of the 63 nesting colonies and two of three non-colony sites investigated. an estimate of in excess of 2 ... | 1999 | 10231759 |
| organochlorine contaminants and biomarker response in double-crested cormorants nesting in green bay and lake michigan, wisconsin, usa. | double-crested cormorant (phalacrocorax auritus) eggs at pipping and sibling 10-day-old chicks were collected from two colonies in green bay, wi, one colony in lake michigan, wi, and reference colonies in south dakota and minnesota. egg contents and chicks were analyzed for organochlorine contaminants including polychlorinated biphenyl (pcb) congeners. livers of embryos and chicks were assayed for hepatic microsomal ethoxyresorufin-o-dealkylase (erod) activity. eggshell thickness and the physica ... | 2001 | 11116344 |