Data/hora: 03/06/2024 10:48:44

Provedor de dados: | 45
País: | Brazil
Título: | The occurrence of Orthoreovirus, Rotavirus and chicken anemia virus in chickens of the poultry industry in Minas Gerais, Brazil
Autores: | Rios,R.L.; Marin,S.Y.; Gomes,A.M.; Resende,J.S.; Bonfim,M.R.Q.; Gomes,A.D.; Resende,F.M.S.; Horta,R.S.; Resende,M.; Martins,N.R.S.
Data: | 2012-12-01
Ano: | 2012
Palavras-chave: | Broiler; Layer; Chicken anemia virus; CAV; Avian reovirus; ARV; Avian rotavirus; AvRV; Nested-PCR; PAGE.
Resumo: | Fifty-four fecal samples taken from broiler chickens from 1 to 45 days of age, and of pullets from 10 to 13 weeks of age, original from eight different poultry regions in the state of Minas Gerais, Brazil, were collected from March 2008 to January 2010 for avian Orthoreovirus (ARV) and avian Rotavirus (AvRV) analyses. For the assay of ARV, RNA was immediately extracted (Trizolâ) and transcribed into cDNA for assaying in a nested-PCR with ARV-specific primers. For AvRV, polyacrylamide gel electrophoresis (PAGE) was performed with RNA extracts obtained by phenol-chloroform extraction. CAV was additionally investigated through a nested-PCR of thymus and spleen. Results found 5.55% positive for ARV and 9.25% for AvRV. Also, CAV and ARV genomes were detected in co-infection, in a highly prostrated and claudicating chicken flock. No ARV or AvRV infections were detected in pullets. Material of a clinically affected flock was inoculated into SPF embryos, resulting in embryonic hemorrhage, whitish foci in the chorio-allantoic membrane and death. Sequencing of ARV amplicons and isolate cDNA grouped local strains with the ARV S1133 strain, historically used in live vaccines, suggesting the continued circulation of this vaccine virus strain in intensive poultry regions. Detection rates for ARV and AvRV, as well as the presence of CAV, were additionally indicative of failing biosecurity strategies for the intensive poultry regions examined.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000600030
Editor: | Universidade Federal de Minas Gerais, Escola de Veterinária
Relação: | 10.1590/S0102-09352012000600030
Formato: | text/html
Fonte: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.64 n.6 2012
Fonte: | info:eu-repo/semantics/openAccess