Key;
Laboratory;
of;
Animal;
Disease;
Control;
and;
Prevention;
Ministry;
of;
Agriculture~Key;
Laboratory;
of;
Zoonoses;
Prevention;
and;
Control;
ofGuangdong;
College;
of;
Veterinary;
Medicine;
South;
China;
Agricultural;
University;
Guangzhou;
510642;
P.R.;
China;
副猪嗜血杆菌; 内酰胺类; 中国南方; 超广谱β-内酰胺酶; 菌株; 表征; 检测; 脉冲场凝胶电泳;