Protection studies of recombinant HVT-IBD and/or live IBD vaccine against 14-day or 25-day AL2 challenge in commercial broilers
Published:February 6, 2023
Summary
AL2 is the most prevalent IBD virus in U.S. broilers, accounting for as much as half of today’s field isolations. The newest recombinant rHVTIBD vaccine was introduced in 2021. Previous studies in broilers with no IBD maternal antibodies showed this vaccine gave high levels of protection (70-78%) against AL2 challenge by 18-19 days. This paper will present 2 studies conducted to measure AL2...