Attenuated Salmonella mutants expressing virulence factors of pathogenic Escherichia coli in poultry and Vaccine composition comprising thereof and application for protection and treatment against pathogenic Escherichia coli and Salmonella in poultry

摘要

The present invention relates to a vaccine for poultry, containing an attenuated Salmonella strain that contains virulence factors of pathogenic Escherichia coli of poultry, and to a vaccine composition using same for preventing and treating colibacillosis and salmonellosis in poultry. The present invention further relates to a method for increasing immune reactions in poultry by inoculating the poultry with said vaccine so as to induce immune reactions in the poultry and thus to prevent colibacillosis and salmonellosis in a safe and effective manner.