1. An occurrence of Newcastle disease in pigeons: virological and serological studies on the isolates.
- Author
-
Biancifiori F and Fioroni A
- Subjects
- Animals, Chickens, Columbidae, Hemagglutination Inhibition Tests, Hemagglutination Tests, Injections, Intraventricular, Italy, Newcastle Disease epidemiology, Newcastle Disease immunology, Newcastle disease virus immunology, Newcastle disease virus isolation & purification, Newcastle disease virus pathogenicity, Quail, Viral Plaque Assay, Newcastle Disease microbiology
- 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 degrees 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.
- Published
- 1983
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