Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Eradication of Lice in Cattle. | Acta vet. scand. 2001 42 81-89. Eradication of Lice in Cattle By O. Nafstad and H. Gr0nst0l Department of Large Animal Clinical Sciences Norwegian School of Veterinary Science Oslo Norway. Nafstad O Gronstol H Eradication of lice in cattle. Acta vet. scand. 2001 42 8189 - The purpose of this field study was to develop and evaluate eradication as a strategy to control lice in cattle. Thirty-three herds of cattle were selected and observed during a period of two and a half years. Before eradication biting lice Damalinia bovis were present in 94 of the herds and 27 of the animals. Sucking lice Linognathus vi-tuli were present in 42 of the herds and 5 of the animals. These levels were very similar to those reported from other countries in Northern Europe. The eradication strategy was successful in 28 of 33 herds but lice were still present in 5 herds 3 to 6 months after treatment. Biting lice were present in all these 5 herds sucking lice were present in 3 herds. During the next 12 months nine of the 28 herds were reinfected with lice. Six herds were reinfected with just biting lice 2 herds with just sucking lice and one herd was reinfected with both. There was no significant difference between the 2 louse species regarding the risk of unsuccessful eradication or reinfection. The only significant risk factor for reinfection was either purchase of livestock or use of common pasture combined with failure in pre-treatment of newly introduced animals. lice cattle Damalinia bovis Linognathus vituli eradication strategy. Introduction Pediculosis in cattle occurs throughout the world and is more common in cattle than in any other domestic animal Urquhart et al. 1987 . Two species of lice are endemic in Norwegian cattle biting lice Damalinia Bovicola bovis Linnaeus 1758 and sucking lice Linogna-thus vituli Linnaeus 1758 . Cattle lice cause irritation and restlessness but there are conflicting opinions concerning their economic effects on livestock production. Fadok 1984 and .
