Molecular characterisation of infectious bursal disease viruses isolated in recent acute outbreaks in Slovenia.
Acta Vet Hung
; 56(2): 255-64, 2008 Jun.
Article
en En
| MEDLINE
| ID: mdl-18669253
ABSTRACT
In 2004 and then in 2006 several outbreaks of infectious bursal disease (IBD) were reported in broiler and broiler breeder flocks in Slovenia. In this report ten recently emerged IBD viruses (IBDV) were characterised by sequence analysis of the VP2 hypervariable region and compared to previous Slovene IBDV strains from 1995/1996 and to some representative serotype 1 IBDV strains of different pathotypes. On the basis of nucleotide and amino acid identities, phylogenetic analyses and the presence of very virulent IBDV (vvIBDV) conserved amino acid substitutions, all Slovene isolates from recent outbreaks were identified as vvIBDV. Although some unique nucleotide exchanges and amino acid substitutions have been observed, the results of this study indicated that recent vvIBDV isolates are closely related with those from outbreaks in the 1990s. However, acute IBD has not been reported in commercial flocks in Slovenia for some years. This could lead to the conclusion that poor biosecurity and relaxed vaccination could be responsible for the re-emergence of vvIBDV.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Enfermedades de las Aves de Corral
/
Pollos
/
Brotes de Enfermedades
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Infecciones por Birnaviridae
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Virus de la Enfermedad Infecciosa de la Bolsa
Límite:
Animals
País/Región como asunto:
Europa
Idioma:
En
Revista:
Acta Vet Hung
Año:
2008
Tipo del documento:
Article
País de afiliación:
Eslovenia