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Efficacy of Two Commercial Newcastle Disease Virus Lentogenic Vaccines Against Virulent Asiatic_Type Newcastle Disease Viruses

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Title Efficacy of Two Commercial Newcastle Disease Virus Lentogenic Vaccines Against Virulent Asiatic_Type Newcastle Disease Viruses
 
Creator Roy, Parimal
Venugopalan, A.T.
Dhillon, A.S.
 
Subject Newcastle Disease Virus (NDV)
Efficacy of RDVF and LaSota MDV Chicken Vaccines
Hemagglutination Inhibition
ELISA
Passive Hemagglutination
 
Description Seventy-five unvaccinated chickens were divided into three equal groups. Chickens in group A received RDVF [Lentogenic strain of Newcastle disease virus (NDV)] vaccine oculonasally at 7 d of age and through drinking water at 4 wk of age. Chickens in group B were vaccinated with LaSota (Lentogenic strain of NDV) in the same way. Group C birds were kept as unvaccinated challenge controls. Five birds from each of these groups were moved to separate pens at 7 wk of age and were challenged witha field isolate No. 105 of virulent NDV (C1, based on monoclonal antibody grouping or Asiatic type, which was isolated from a disease outbreak). Similarly, five birds from each of the groups were moved to different pens at same age and challenged with the reference strain of the virulent NDV. All the unvaccinated birds died postchallenge, but both vaccinated groups withstood the challenge. Serum samples were collected from all three groups at different times, and antibody levels (against NDV) were measured by hemagglutination inhibition test, passive hemagglutination test, and enzyme-linked immunosorbent assay.The possibility of Asiatic-type NDV causing outbreaks in commercially vaccinated flocks is discussed in this paper.
 
Date 2016-08-16T14:40:08Z
2016-08-16T14:40:08Z
2003
 
Type Article
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72617
 
Language en
 
Format application/pdf
 
Publisher Poultry Science Association, Inc.