SITES OF INJECTION
We can consider that there are 5 basic compartments on an egg during the final stage of incubation: Air Cell,
Allantoic sac (waste), Amniotic sac, the Embryo itself and the Yolk sac.
The air cell which is basically filled with gas.
The allantoic sac which is filled with fluid and it stores
what it is usually referred as the waste inside the egg.
Amniotic sac which is composed by amniotic fluid
and the embryo body.
The embryo itself which is located inside the amniotic
sac.
The yolk sac which is also inside the amniotic sac
Any one of those compartments can be accessed by the needle of the In-Ovo injection machine. However, in
order to achieve and maximize immune response by In-Ovo vaccination, it is essential to assure that the correct
compartment inside the egg is accessed.