Wojcinski Z W, Barker I K, Hunter D B, Lumsden H
J Wildl Dis. 1987 Apr;23(2):248-55. doi: 10.7589/0090-3558-23.2.248.
A heavy infection with schistosomes of the genera Trichobilharzia and Dendritobilharzia was considered the cause of 90% mortality in a group of 40 wild-caught Atlantic brant geese (Branta bernicla hrota) that were maintained in captivity on a fresh-water pond in Aurora, Ontario. Numerous adult worms and eggs were disseminated in many organs throughout the body of all birds examined. The main pathological findings, attributed to both eggs and adults, included emaciation, thrombosis of the caudal mesenteric vein and its branches, fibrinohemorrhagic colitis, and in some birds, heptomegaly. Translocation of brant geese from their natural marine environment to a fresh-water pond may have caused them to be exposed to parasites which they would not normally encounter.
感染大量毛毕属和枝毕属血吸虫被认为是导致40只野生捕获的大西洋黑雁（Branta bernicla hrota）死亡90%的原因，这些黑雁被圈养在安大略省奥罗拉市的一个淡水池塘中。在所有接受检查的鸟类体内，许多器官中都散布着大量成虫和虫卵。主要病理发现，归因于虫卵和成虫，包括消瘦、尾肠系膜静脉及其分支血栓形成、纤维蛋白出血性结肠炎，在一些鸟类中还包括肝肿大。将黑雁从其自然的海洋环境转移到淡水池塘可能使它们接触到了通常不会遇到的寄生虫。
