The aim of this study was to quantify transmission of infectious bronchitis virus (IBV) H120 vaccine strain among broilers, and to assess whether birds that have been exposed to vaccine strain-shedding birds were protected against clinical signs after infection with a virulent strain of the same ser...

Infectious bursal disease (IBD) is an acute, highly contagious, economically important disease of young chickens caused by Avibirnavirus, the infectious bursal disease virus (IBDV). The causative virus is highly resilient in poultry environments and vaccination is the most effective measure for IBDV...

Newcastle disease (ND) is a worldwide problem with severe economic implications, affecting chickens, turkeys and other birds. Newcastle disease virus (NDV), a member of the Paramyxoviridae group can cause disease of diverse severity in accordance with environmental factors. NDV strains are classifie...