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中文摘要：
牛呼吸疾病综合征是严重危害国内外肉牛养殖业的一种重要传染病,该病的致病因素复杂,包括支原体、病毒和细菌等特异性病原以及运输应激等多种因素。美国等发达国家对该病的攻关研究开始于上世纪80年代初,其研究和临床防控均已达到较高水平,但仍认为该病将是未来10～20年养牛业所面临的主要疾病。我国对该病的认识和研究尚处于起步阶段,借鉴世界上发达国家的先进经验将有助于提升我国对该病的防控水平。
英文摘要：
Bovine respiratory disease complex（BRD） is a most costly disease in beef industry.It is a multifactor disease caused by pathogens such as Mycoplasma,viruses and bacteria,transport stress,etc.The developed countries such as America began to study this disease in early 1980＇s,and the research and control for BRD have reached a high level of platform.However,BRD is still thought to be the most important disease for cattle in the next 10 to 20 years.China just began to realize the impact of BRD to the cattle industry in recent years and study the prevalence and control.To learn the experience and knowledge from the developed countries would help China to improve the control of BRD in cattle.
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