The in vitro Antibacterial Activity of Macleaya cordata Extract against Four Common Pathogenic Bacteria in Pig Farms

• Diangang HAN, 
• Hongqing YANG, 
• Jige XIN, 
• Litao CHE, 
• Chunyong ZHANG, 
• Yunqing YANG, 
• Jun DONG, 
• Rongfu GUO