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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: Bovine Respiratory Syncytial Virus. | Acta vet. scand. 2001 42 113-121. Bovine Respiratory Syncytial Virus BRSV Pneumonia in Beef Calf Herds Despite Vaccination By L.E. Larsen1 C. Tegtmeier1 and E. Pedersen2 1Danish Veterinary Laboratory Copenhagen and 2Vestfyns Dyrlaeger A S Middelfart Denmark. Larsen LE Tegtmeier C Pedersen E Bovine respiratory syncytial virus BRSV pneumonia in beef calf herds despite vaccination. Acta vet. scand. 2001 42 113121. - The present report describes the clinical pathological serological and virologi-cal findings in calves from 2 larger Danish beef herds experiencing outbreaks of pneumonia. The calves had been vaccinated with an inactivated bovine respiratory syncytial virus BRSV vaccine 2 months prior to the outbreak. The clinical signs comprised nasal discharge pyrexia cough and increased respiratory rates. A total of 28 calves died in the 2 herds. The laboratory investigations revealed that BRSV was involved and probably initiated both outbreaks. Furthermore the serological results suggested that the vaccine induced only sparse levels of antibodies probably due to the presence of maternally derived antibodies at the time of vaccination. Necropsy findings in 5 calves revealed changes typical for infectious pneumonia with involvment of BRSV In conclusion vaccination of calves against BRSV in 2 Danish beef herds failed to protect the calves against severe or even fatal BRSV mediated respiratory disease 2 months later. Bovine respiratory syncytial virus BRSV vaccination enzootic pneumonia serology calves. Introduction Respiratory disease is one of the most important health problems in young Danish cattle with substantial financial losses for the industry Tegtmeier et al. 1999 Uttenthal et al. 1996 . Thus approximately 20 of the materials from bovines submitted to The Danish Veterinary Laboratory DVL for necrosy originate from cattle with a history of respiratory symptoms. Bovine respiratory syncytial virus BRSV has been recognised in recent years as the major viral component
