Identification and assessment of pathogenicity of a naturally reassorted infectious bursal disease virus from Henan, China.
China
HN strain
infectious bursal disease virus
phylogenetic analysis
virulence
Journal
Poultry science
ISSN: 1525-3171
Titre abrégé: Poult Sci
Pays: England
ID NLM: 0401150
Informations de publication
Date de publication:
01 Dec 2019
01 Dec 2019
Historique:
received:
10
06
2019
accepted:
11
08
2019
pubmed:
11
9
2019
medline:
22
4
2020
entrez:
11
9
2019
Statut:
ppublish
Résumé
Infectious bursal disease virus (IBDV) is still a vital etiological agent in poultry farms. IBDV outbreaks occasionally occur due to the presence of very virulent, reassortment or variant strains. Vaccine immunization has played crucial roles in IBD control for decades. However, survival pressure of IBDV from the vaccine immunization also increases the reassortments of circulating viruses. In this study, an IBDV strain was isolated from several broiler farms in Henan Province, central part of China, and named IBDV HN strain. Based on the results of RT-PCR, sequencing and phylogenic analyses of VP1 and VP2 genes, the IBDV HN strain is a novel reassortment strain in the Henan region. Segment A of this strain appears to originate from the very virulent IBDV strain, while segment B comes from the other field reassortment strains. This may be the result of natural reassortant of virus circulating in the field. About 60% (6/10) of experimentally infected specific pathogen-free chickens died after 3 to 5 d post-infection with typical symptom and pathological lesions. The IBDV HN strain was prone to horizontal transmission, which poses a serious threat to the chicken industry. Further investigation on the prevalence, virulence, and evolution of HN strain IBDV will provide a foundation for the prevention and control of the disease in this region.
Identifiants
pubmed: 31504884
pii: S0032-5791(19)57950-0
doi: 10.3382/ps/pez498
pmc: PMC8913969
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
6433-6444Informations de copyright
© 2019 Poultry Science Association Inc.
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