Dalian Sanyi Bioengineering Institute Dalian 116036 China;
Jiangsu Sanyi Bioengineering Co. Ltd. Pizhou 221300 China;
Dalian Sanyi Bioengineering Institute Dalian 116036 ChinaJiangsu Sanyi Bioengineering Co. Ltd. Pizhou 221300 China;
Avian; E.coli; Separation and identification; Drug resistance; Lactobacillus; In vitro competition;