Molecular Characterization of a Novel Integrative Conjugative Element ICEHpa1 in Haemophilus parasuis oleh Hua-Run Sun, Xiao-Die Cui, Xiao-Kang Liu, Shuai-Hua Li, Kai-Fang Yi, Yu-Shan Pan, Hua Wu, Li Yuan, Gong-Zheng Hu, Dan-Dan He