A survey for maintenance of virulent newcastle disease virus-free area in poultry production in Brazil
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Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Sociedade Brasileira de Microbiologia
Type
Article
Access right
Acesso aberto
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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.
Description
Keywords
Newcastle disease virus, Pathogenicity, Poultry, biological characterization
Language
English
Citation
Brazilian Journal of Microbiology. Sociedade Brasileira de Microbiologia, v. 41, n. 2, p. 368-375, 2010.
