Diagnosis of IBV field challenge

Diagnosis of disease can be accomplished by the combined evaluation of flock history, clinical signs, serology and isolation and identification of the pathogen. Serological monitoring can be particularly helpful in establishing the timing and nature of a field infection. By Dr Bart van Leerdam, BioChek bv, Reeuwijk, the Netherlands, and Dr Pieter Kuhne, Intervet/Schering-Plough Animal Health, Boxmeer, the Netherlands  For unvaccinated flocks, the presence of IBV field challenge can simply