The Investigation and Analysis of Infectious Disease in Breeding Pigs in Yunnan Province

• SONG Chunlian, 
• LI Yongneng, 
• SHU Xianghua, 
• LI Wengui, 
• YIN Gefen, 
• ZHANG Yongyun, 
• GAO Libo, 
• BAI Weibing, 
• SHI Huoying