Infectious bronchitis in layers: In certain cases of infectious bronchitis (IB), respiratory process or alterations in the quality of the egg are not found, since the hens are protected thanks to the vaccination. However, in stress or high production periods, a decrease in the laying percentage can be observed, and at the necropsy we can observe hydrosalpingitis, as we can see in the image. It is important to review the vaccination program and strengthen the immune system of the hens.