AVIAN COMBINATION-VACCINE AGAINST E. COLI AND SALMONELLA

摘要

There is provided a vaccine composition comprising a combination of a genetic deletion mutant S. typhimurium microorganism and a genetic deletion mutant E. coli microorganism, suitable for mass application to poultry. Also provided is a safe and effective method to protect poultry against the ravages of E coli and Salmonella infection and disease.