1. Isolation and identification of avian pathogenic Escherichia coli Samples of the birds died of colisepticemia were collected from the veterinary stations and breeding fields in and around the JiangSu province. Bacteria were isolated and identified by biochemistry identification in the lab. Finally, 195 APEC ( avian pathogenic Escherichia coli ) strains were identified. The O serotyping of these bacteria strains were performed by slide agglutination and cuvette agglutination using the standard ...