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Orsi M, Doretto Jr L, Camillo S, Reischak D, Ribeiro S, Ramazzoti A, Mendonça A, Spilki F, Buzinaro M, Ferreira H, Arns C. Prevalence of newcastle disease virus in broiler chickens (Gallus gallus) in Brazil. Braz J Microbiol 2010. [DOI: 10.1590/s1517-83822010000200014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Orsi MA, Doretto L, Camillo SCA, Reischak D, Ribeiro SAM, Ramazzoti A, Mendonça AO, Spilki FR, Buzinaro MG, Ferreira HL, Arns CW. Prevalence of newcastle disease virus in broiler chickens (Gallus gallus) in Brazil. Braz J Microbiol 2010; 41:349-57. [PMID: 24031503 PMCID: PMC3768679 DOI: 10.1590/s1517-838220100002000014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 07/23/2009] [Accepted: 02/17/2010] [Indexed: 11/22/2022] Open
Abstract
This 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.
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Affiliation(s)
- M A Orsi
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento , Campinas, SP , Brasil ; Faculdade de Ciências Médicas, Universidade Estadual de Campinas , Campinas, SP , Brasil
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Orsi M, Doretto Jr L, Camillo S, Reischak D, Ribeiro S, Ramazzoti A, Mendonça A, Spilki F, Buzinaro M, Ferreira H, Arns C. A survey for maintenance of virulent newcastle disease virus-free area in poultry production in Brazil. Braz J Microbiol 2010. [DOI: 10.1590/s1517-83822010000200017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Orsi M, Doretto Jr L, Camillo S, Reischak D, Ribeiro S, Ramazzoti A, Mendonça A, Spilki F, Buzinaro M, Ferreira H, Arns C. A survey for maintenance of virulent newcastle disease virus-free area in poultry production in Brazil. Braz J Microbiol 2010; 41:368-75. [PMID: 24031506 PMCID: PMC3768700 DOI: 10.1590/s1517-838220100002000017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 03/16/2009] [Accepted: 02/17/2010] [Indexed: 11/10/2022] Open
Abstract
In 2003, Brazil was recognized as a pathogenic Newcastle Disease Virus (NDV) strain-free country for commercial poultry. This research was conducted in Brazil between December 2003 and March 2005 to verify the maintenance of this virulent NDV-free status. Serum samples from 5,455 flocks for commercial poultry farms were collected, comprising 81,825 broiler chickens. The farms were located in nine states of the country, grouped in three geographic regions. Serological evidence of NDV infection was detected in 28.8% of the surveyed farms. However, all fifteen viruses isolated and identified as Newcastle Disease Virus (NDV) were characterized as nonpathogenic strains, based on the Intracerebral Pathogenicity Index. These results showed that Brazil preserves the virulent NDV-free status for commercial flocks.
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Affiliation(s)
- M.A. Orsi
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil,Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - L. Doretto Jr
- Centro Brasileiro de Pesquisa Animal, Amparo, SP, Brasil
| | - S.C.A. Camillo
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil
| | - D. Reischak
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil
| | - S.A.M. Ribeiro
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil
| | - A. Ramazzoti
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil
| | - A.O. Mendonça
- Laboratório Nacional Agropecuário, Ministério da Agricultura, Pecuária e Abastecimento, Campinas, SP, Brasil
| | - F.R. Spilki
- Instituto de Ciências da Saúde, Centro Universitário Feevale, Novo Hamburgo, RS, Brasil
| | - M.G. Buzinaro
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - H.L. Ferreira
- Laboratório de Virologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil
| | - C.W. Arns
- Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil,Laboratório de Virologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil,*Corresponding Author. Mailing address: Laboratory of Virology, Institute of Biology, UNICAMP, CP 6109, 13083-970, Campinas, SP, Brazil.; Tel: +55 19 35216267 Fax: +55 19 35216276.; E-mail address:
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