White Chick Syndrome Associated with Chicken Astrovirus in Ontario, Canada.
Avian Dis
; 62(2): 247-258, 2018 06.
Article
em En
| MEDLINE
| ID: mdl-29944402
ABSTRACT
Sixty-four cases of white chick syndrome (WCS) in broiler breeders producing affected progeny were reported from seven hatcheries in Ontario, Canada, between 2009 and 2016, with 43 of those originating from two hatcheries owned by a single company. WCS cases were identified by the presence of typical chicks in the hatchery that were generally weak with pale to white down, enlarged abdomens, and occasionally brown wiry fluff on the dorsum of the neck. Affected embryos and chicks had characteristic gross and histologic liver lesions, and livers were positive for chicken astrovirus (CAstV) RNA by real-time reverse transcriptase PCR. Affected broiler breeder flocks experienced egg production drops of 0% to 21% and hatchability drops of 0% to 68.4%. The amino acid sequence of the region encoding the capsid gene of WCS viruses demonstrated all Ontario CAstV to be in Group B, Subgroup Bii.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doenças das Aves Domésticas
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Infecções por Astroviridae
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Avastrovirus
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Animals
País como assunto:
America do norte
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article