Combining serotype vaccines might be a popular approach to protecting flocks against evolving strains of infectious bronchitis virus, such as DMV/1639, but not all combinations work equally well.
The timing of infectious bronchitis virus (IBV) challenge in layers can impact the development of cysts associated with false layer syndrome, scientists at the University of Georgia have discovered.
Research is increasingly linking false layer syndrome to early exposure to infectious bronchitis virus. The condition prevents laying hens from producing eggs, but birds display few outward signs of ill health and develop ordinary combs.
A few essential adjustments in the way infectious bronchitis vaccines are handled and administered at the hatchery can improve vaccine efficacy.
