The present invention provides recombinant viral vectors that contain and express antigens of avian pathogens, compositions comprising the recombinant viral vectors, polyvalent vaccines comprising the recombinant viral vectors. The present invention further provides methods of vaccination against a variety of avian pathogens and method of producing the recombinant viral vectors.本發明提供含有並表現禽病原體抗原之重組病毒載體、包含該等重組病毒載體之組合物、包含該等重組病毒載體之多價疫苗。本發明進一步提供針對多種禽病原體之疫苗接種方法及產生該等重組病毒載體之方法。