An occurrence of Newcastle disease in pigeons: Virological and serological studies on the isolatesFoyers de maladie de Newcastle chez le pigeon: Etudes virologiques et serologiques sur des souches isolees |
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Authors: | F Biancifiori A Fioroni |
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Affiliation: | Istituto Zooprofilattico Sperimentale dell''Umbria e delle Marche, Via G. Salvemini 1, 06100 Perugia, Italy |
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Abstract: | The antigenic and pathogenetic relationship between pigeon Newcastle disease virus (NDV) isolates during outbreaks of 1982 in Italy and reference pathogen and non-pathogen NDV-strains were investigated.The pigeon-isolates were slow-eluters and showed a thermostability at 56°C of over 30 min. They proved to be lentogenic as measured by the mean-death-time in chicken-embryos, and between lentogenic and mesogenic as measured by the Hanson test. They failed to produce plaques in chicken-embryo-fibroblasts and showed high pathogenicity for experimentally infected pigeons, low-pathogenicity for quails and were not pathogenic for chickens. They were antigenically different from the LaSota strain as measured by the cross-HI-test and induced considerable seroconversion in inoculated animals. The existence of a lentogenic neurotropic pigeon-pathogenic strain was considered. |
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Keywords: | Newcastle disease pigeon-strain characterization experimental infection of pigeon quail chicken cross-HI-test Maladie de Newcastle pigeon caractérisation antigénique inoculation expérimentale sur pigeon poulle et caille test d'IH |
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