A survey for maintenance of virulent newcastle disease virus-free area in poultry production in Brazil
Braz. j. microbiol
; Braz. j. microbiol;41(2): 368-375, Apr.-June 2010. tab, ilus
Article
de En
| LILACS
| ID: lil-545344
Bibliothèque responsable:
BR32.1
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 percent 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.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
LILACS
Sujet principal:
Réactions Biologiques
/
Avulavirus
/
Maladie de Newcastle
Type d'étude:
Prognostic_studies
Limites:
Animals
Pays/Région comme sujet:
America do sul
/
Brasil
Langue:
En
Journal:
Braz. j. microbiol
Sujet du journal:
MICROBIOLOGIA
Année:
2010
Type de document:
Article
Pays d'affiliation:
Brésil
Pays de publication:
Brésil