An evaluation of Newcastle disease virus spray vaccination programs of market turkeys.

C. J. Kelleher, D. A. Halvorson, J. A. Newman

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Commercial market turkeys that were spray-vaccinated at 2 to 3 weeks of age with viable Newcastle disease virus (NDV) vaccine usually did not develop high or persistent levels of serum antibody as detected by the hemagglutination-inhibition test. Vaccinated turkeys exhibited a satisfactory level of resistance to infection and clinical disease when challenged by the oculonasal or aerosol route at 2 weeks post-vaccination, and they resisted clinical disease when challenged at 6 weeks, but the level of protection diminished by 10 weeks post-vaccination. It is suggested that market turkeys produced in an NDV-enzootic area may require two or more NDV vaccinations by spray during their growing period in order to be adequately protected against natural NDV infection.

Original languageEnglish (US)
Pages (from-to)431-437
Number of pages7
JournalAvian diseases
Volume31
Issue number3
DOIs
StatePublished - Jan 1 1987

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