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- Roussan, D.A.; Haddad, R.; Khawaldeh, G.; Shaheen, I.
- J. poult. sci 2007 v.44 no.4 pp. 446-452
- broiler chickens; Newcastle disease; Newcastle disease virus; vaccination; commercial farms; flocks; disease course; infectious bursal disease; Infectious bursal disease virus; disease outbreaks; bursa of Fabricius; immune response; Jordan
- ... Infectious bursal disease virus (IBDV) and Newcastle disease virus (NDV) are the most important viruses in poultry, causing catastrophic economical losses to farmers and to chicken breeding companies in Jordan. Fifteen commercial broiler chicken flocks were vaccinated twice against NDV and once against IBDV. Clinical signs of Newcastle disease appeared at 23-25 days of age, mortality and morbidity ...