Journal ArticleDOI
Nucleotide Sequence and Phylogenetic Analysis of Newcastle Disease Virus Isolates from Recent Outbreaks in Taiwan
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TLDR
The results suggest that the 1995 outbreak of Newcastle disease (ND) in Taiwan may have been caused by multiple strains of velogenic NDV that have cocirculated in Taiwan for some time.Abstract:
SUMMARY. Portions of the hemagglutinin neuraminidase (HN) gene of Newcaste disease virus (NDV) isolates from two recent outbreaks were sequenced to investigate epidemiology of this disease in Taiwan. These NDV isolates were all viscerotropic velogenic according to the clinical lesions produced in chickens. Sequence data were obtained from 14 NDV isolates (12 from 1995 and 2 from 1984). All isolates differed in their nucleotide sequences (from 0.3 to 15.3%), and represented potentially different strains of NDV. Phylogenetic analysis revealed that these isolates are closely related to viruses isolated from Japan and Malaysia. Some viruses isolated in 1995 appeared to evolve from viruses isolated in 1984. The results suggest that the 1995 outbreak of Newcastle disease (ND) in Taiwan may have been caused by multiple strains of velogenic NDV that have cocirculated in Taiwan for some time. Moreover, NDV isolates from racing pigeons were very similar to isolates from chickens in the same period, suggesting that both domestic and free-living birds were involved in the spread of ND in Taiwan.read more
Citations
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Journal ArticleDOI
Detection and differentiation of Newcastle disease virus (avian paramyxovirus type 1).
E W Aldous,D J Alexander +1 more
TL;DR: Panels of monoclonal antibodies were a major advance for the characterization of NDV isolates, although confirmation of virulence for poultry still required in vivo testing and molecular-based techniques become easier and more reliable.
Journal ArticleDOI
Characterization of Newly Emerging Newcastle Disease Virus Isolates from the People's Republic of China and Taiwan
TL;DR: Results showed that the close genetic similarity provided evidence for the epidemiological linkage between the outbreaks in China and Taiwan and that the 1990s outbreaks in Asia, the Middle East, Africa, and Europe constituted the fourth panzootic of ND.
Journal ArticleDOI
Two novel genetic groups (VIIb and VIII) responsible for recent Newcastle disease outbreaks in Southern Africa, one (VIIb) of which reached Southern Europe.
J. Herczeg,Enikő Wehmann,Robert R. Bragg,P. M. Travassos Dias,G. Hadjiev,Ortrud Werner,B. Lomniczi +6 more
TL;DR: 34 strains of Newcastle disease virus isolated during epizootics in the Republic of South Africa and in Mozambique between 1990 and 1995, and in Bulgaria and Turkey in 1995–1997 were identified by restriction enzyme and partial sequence analysis of the fusion (F) protein gene.
Journal ArticleDOI
A phylogenetic study of South African Newcastle disease virus strains isolated between 1990 and 2002 suggests epidemiological origins in the Far East.
TL;DR: Genetic comparisons were made of the fusion protein sequences of 155 Newcastle disease virus isolates collected in South Africa between 1990 and 2002 and it was shown that almost all mesogenic isolates had avirulent F0 cleavage site sequences.
Journal ArticleDOI
Newcastle disease virus isolated from recent outbreaks in Taiwan phylogenetically related to viruses (genotype VII) from recent outbreaks in western Europe.
TL;DR: It is suspected that these outbreaks of Newcastle disease in Taiwan have constituted the fourth panzootic of ND, which is distinct from the third panZootic caused by the "pigeon PMV-1 viruses."
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