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Protection of new technology vaccine against Malaysia velogenic NDV GVII and GVIII isolates in broiler chickens


Citation

Bejo, Mohd Hair and L., Jessica T. M. and Saw, P. Y. (2015) Protection of new technology vaccine against Malaysia velogenic NDV GVII and GVIII isolates in broiler chickens. In: World Veterinary Poultry Association (Malaysia Branch) and World's Poultry Science Association (Malaysia Branch) Scientific Conference 2015, 21-22 Sept. 2015, Kuala Lumpur Convention Centre, Kuala Lumpur, Malaysia. (pp. 28-31).

Abstract / Synopsis

Two experiments were conducted to determine the efficacy of a new technology vaccine, Vectormune® ND, a vector vaccine against Malaysia velogenic Newcastle disease virus (vNDV) genotypes VII (GVII) and VIII (GVIII) in broiler chickens. The study demonstrated that the vaccination programme could provide 100% protection to the chickens against GVII challenged at days 31 or 35 of age. Protection of 95% was achieved when the chicken were challenged with either GVII or GVIII at day 14 of age. The HI antibody titre and protection increased with time. GVII infected chickens in the unvaccinated group showed milder lesions with lower mortality rate when compared to the GVIII infected chickens. Torticollis was commonly recorded in chicken infected with GVII. It was concluded that a vaccination programme combining Vectormune® ND with a live attenuated ND/IB vaccine and a booster vaccination with La Sota is highly effective to provide protection to the chickens against GVII or GVIII challenged. Outbreaks of ND in the country is not due to failure of the NDV vaccine strains, but rather than due to other factors that lead to vaccination failures as well as poor vaccination strategy.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Veterinary Medicine
Publisher: Faculty of Veterinary Medicine, Universiti Putra Malaysia
Keywords: Vectormune® ND (vector vaccine); vNDV GVII and GVIII; HI titre; Vaccination programme and protection; Broiler chickens
Depositing User: Nabilah Mustapa
Date Deposited: 03 Sep 2018 12:20
Last Modified: 03 Sep 2018 12:20
URI: http://psasir.upm.edu.my/id/eprint/65001
Statistic Details: View Download Statistic

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