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Apathogenic strains of Newcastle Disease

Authors: Lohr JE
Publication: New Zealand Veterinary Journal, Volume 28, Issue 12, pp 267, Dec 1980
Publisher: Taylor and Francis

Animal type: Avian, Poultry, Production animal
Subject Terms: Notifiable organisms/exotic disease, Viral, Disease/defect, Infectious disease, Respiratory system, Species description
Article class: Correspondence

Abstract: Referring to the paper on strains of Newcastle Disease by Durham et al. (N.Z. vet. J. 28: 108-12), I would like to add some information. Earlier this year our laboratory in the German Federal Republic had the opportunity to screen 46 avian sera from 6 different New Zealand flocks for antibodies to a number of viral antigens. One flock without a history of previous disease had haemagglutination inhibiting (HI) antibodies to Newcastle Disease (ND), with an HI-index ranging between 2^-3 and 2^-8 (mean 2^-6). Such HI indices are considerably above those usually obtained in our district after drinking water vaccination of chickens with the lentogenic Hitchner B₁ strain of ND virus…

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