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dc.typeArtigo de periódicopt_BR
dc.titlePrevalence Of Newcastle Disease Virus In Broiler Chickens (gallus Gallus) In Brazil.pt_BR
dc.contributor.authorOrsi, M Apt_BR
dc.contributor.authorDoretto, Lpt_BR
dc.contributor.authorCamillo, S C Apt_BR
dc.contributor.authorReischak, Dpt_BR
dc.contributor.authorRibeiro, S A Mpt_BR
dc.contributor.authorRamazzoti, Apt_BR
dc.contributor.authorMendonça, A Opt_BR
dc.contributor.authorSpilki, F Rpt_BR
dc.contributor.authorBuzinaro, M Gpt_BR
dc.contributor.authorFerreira, H Lpt_BR
dc.contributor.authorArns, C Wpt_BR
unicamp.authorFaculdade de Ciências Médicas, Universidade Estadual de Campinas , Campinas, SP , Brasil.pt_BR A Orsi, Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento , Campinas, SP , Brasilpt Doretto,pt C A Camillo,pt Reischak,pt A M Ribeiro,pt Ramazzoti,pt O Mendonça,pt R Spilki,pt G Buzinaro,pt L Ferreira,pt W Arns,pt
dc.subjectNdv-free Statuspt_BR
dc.subjectNewcastle Disease Viruspt_BR
dc.subjectBiological Characterizationpt_BR
dc.subjectBroiler Chickenspt_BR
dc.description.abstractThis study was carried out during 2002/2003, aiming to determine the prevalence of virulent Newcastle disease virus strains (NDV) in Brazilian commercial poultry farms. Clinical samples were obtained from the Southeastern, Southern and Central-Western regions, which comprise the main area of the Brazilian poultry production. Serum samples and tracheal and cloacal swabs of 23,745 broiler chickens from 1,583 flocks, including both vaccinated chickens and those with no vaccination information, were tested for NDV using a diagnostic ELISA kit. The seropositivity was 39.1%, and the isolation percentage by flock varied from 1.0 to 7.6%, and by region from 6.5 to 58.4%. Higher isolation rates (74.3-83.3%) were obtained after three passages in embryonated chicken eggs. All isolates preliminarily identified as NDV were characterized as nonpathogenic strains, as their Intracerebral Pathogenicity Index (ICPI) was below 0.7. Based on results of this study, Brazil can claim a virulent NDV-free status for commercial flocks.en
dc.relation.ispartofBrazilian Journal Of Microbiology : [publication Of The Brazilian Society For Microbiology]pt_BR
dc.relation.ispartofabbreviationBraz. J. Microbiol.pt_BR
dc.identifier.citationBrazilian Journal Of Microbiology : [publication Of The Brazilian Society For Microbiology]. v. 41, n. 2, p. 349-57, 2010-Apr.pt_BR
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