IBV Variants in the Middle East
Dr. Husam Bakri.
/ Technical and Pharmacovigilance, Manager, MSD Middle East - Dubai.
IntroductionInfectious bronchitis (IB) virus, first described in the 1930s (Schalk & Hawn, 1931), continues to be a major cause of disease in chickens of all ages and types in all parts of the world (Anon, 1988, 1991). Good quality vaccines have been available to control IB infections since the 1950s. However, despite their careful use, IB continues to be a major problem. One reason for this i...