Unexpected Newcastle Disease Virus in Day Old Commercial Chicks and Breeder Hen

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Date
2005
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Comparative Immunology, Micobiology and Infectious Diseases
Abstract
Newcastle disease virus (NDV) specific antigen in the gut contentsand NDV specific antibody in blood circulation were seen in day old chicks belonging to nine different commercial hatcheries of Tamil Nadu, India. Antigen disappeared by 4th week and antibody by 6th week of age. Fourteen NDV isolates obtained from the gut contents of day old chicks of different commercial hatcheries, one NDV isolate from dead in shell eggs and one NDV isolate from breeder hen were characterized and grouped under velogenic, mesogenic and lentogenic pathotypes. Four isolates were grouped under F and another four isolates were grouped under E based on reaction with monoclonal antibodies (Mabs) but found to be velogenic based on pathogenicity tests. In one particular flock velogenie NDV was isolated from breeder hen, dead in shell embryos and day old chicks and they all belong to Mabs groups E. Vertical transmission of velogenic, mesogenic and lentogenic NDVs and role of NDV Published by Elsevier Ltd.
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Keywords
Newcastle Disease, Pathotypes, MDT, ICPI, Monoclonal Antibody, Transovarian Transmission
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