2Snowder G D, van Vleck L D, Cundiff L V, et al. Bovine respiratory disease in feedlot cattle: environmental, genetic, and economic factors[J].J Anim Sci, 2006,84(8) : 1999-2008.
3Taylor J D, Fulton R W, Lehenbauer T W, et al. The epidemiology of bovine respiratory disease: What is the evidence for predisposing factors [J]. Can Vet J, 2010, 51(12) : 1351-1359.
4Apley M. Bovine respiratory disease: pathogenesis, clinical signs, and treatment in lightweight calves [J]. Vet Clin North Am Food Anim Praet, 2006, 22(2) :399-411.
5Booker C W, Abutarbush S M, Morley P S, et al. Microbiological and histopathologieal findings in cases of fatal bovine respiratory disease of feedlot cattle in Western Canada[J]. Can Vet J, 2008,49(5):473-481.
6Ellis J A. Update on viral pathogenesis in BRD[JJ. Anim Health Res Rev, 2009,10 (2) :149-153.
7Confer A W. Update on bacterial pathogenesis in BRD[J]. Anita Health Res Rev,2009, 10(2) : 145-148.
8Griffin D, Chengappa M M, Kuszak J, et al. Bacterial pathogens of the bovine respiratory disease complex[J]. Vet Clin North Am Food Anim Pract, 2010,26(2) :381-394.
