Authors : A. Ballal , A. M. Elhussein and A. E. Karar
Abstract: Infectious bronchitis (IB) virus field isolates were serotype using virus neutralization (VN) and haemagglutination inhibition (HI) tests. The viruses were isolated from an outbreaks of IB in broiler and layer chicken flocks in Sudan during 2000- 2001. Four isolates (3 from layer and 1 from breeder broiler flocks) were found antigenically similar to IB virus strain 4/91. With neutralization index (NI) 4.4 - 5.0 and VN titer = 11 (log ). 2 On the other hand, four isolates from commercial broiler flocks and one isolate from layer were found antigenically similar to IB Massachusetts Mass. serotypes with HI titer = 11 (log ). This is the first report of 2 various IB serotypes that are prevalent in Sudan.
A. Ballal , A. M. Elhussein and A. E. Karar , 2005. Serotypes of Avian Infectious Bronchitis Virus Isolates From Field Cases in Sudan . Journal of Animal and Veterinary Advances, 4: 663-665.