When David Smith served as Extension veterinarian at the University of Nebraska, he and his colleagues worked with ranchers who were trying to solve their problems with scours at calving time. "We looked at disease pathogens but could find of the ordinary," recalls Smith, who now serves as beef program leader at MississippiState University Colle Veterinary Medicine.
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机译：戴维·史密斯（David Smith）在内布拉斯加大学（University of Nebraska）担任推广兽医时，他和他的同事与牧场主一起工作，他们试图在产犊时解决冲刷问题。史密斯回忆说：“我们研究了病原体，但可以找到普通的病原体。”史密斯现任密西西比州立大学Colle兽医学院牛肉项目负责人。
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