Isolation and Identification of Low Virulence in Field Strain of Riemerella anatipestifer
GAO Ji-ye;TANG Yu;ZHAO Jie;DING Meng-jian;LIU Yan;LIU Zi-yong;LI Ji-xiang
China Animal Husbandry & Veterinary Medicine . 2010, (6): 141 -144 .