10ZHANG Nian-zhang,CHU Yue-feng,ZHAO Ping,GAO Peng-cheng,HE Ying,LU Zhong-xin Lanzhou Veterinary Research Institute,Chinese Academy of Agricultural Sciences,State key Laboratory of Veterinary Etiological Biology,Key Laboratory of Grazing Animal Diseases of Ministry of Agriculture,and Key Laboratory of Animal Virology of Ministry of Agriculture,Lanzhou 730046,China.Comparison of Two Construction Methods of Targeting Gene of Haemophilus parasuis[J].Animal Husbandry and Feed Science,2010,2(8):28-31.