초록 ▼

Avian diseases, particularly those which threaten birds early in life, are controlled by embryonal vaccination during the final quarter of incubation. The site of inoculation may be either into the amnion, to include the amniotic fluid and the embryo itself, or else into the yolk sac. Protection aff

Avian diseases, particularly those which threaten birds early in life, are controlled by embryonal vaccination during the final quarter of incubation. The site of inoculation may be either into the amnion, to include the amniotic fluid and the embryo itself, or else into the yolk sac. Protection afforded to chicks inoculated prehatch is four times or more than that of chicks inoculated post-hatch.

대표청구항 ▼

A method for controlling an immunizable disease of viral, bacterial, or microbial origin in an avian species comprising injecting a vaccine effective for inducing immunity against said disease into the egg embodying the embryo of said avian species, wherein said injection is made during the final qu

A method for controlling an immunizable disease of viral, bacterial, or microbial origin in an avian species comprising injecting a vaccine effective for inducing immunity against said disease into the egg embodying the embryo of said avian species, wherein said injection is made during the final quarter of the incubation period whereby the embryo has developed immunologic competence and wherein said vaccine is injected within the region defined by either the amnion or the yolk sac.