Prevalence of Bluetongue virus serotype 4 in cattle in the State of Sao Paulo, Brazil.
Vet Ital
; 52(3-4): 319-323, 2016 Sep 30.
Article
em En
| MEDLINE
| ID: mdl-27723043
ABSTRACT
Bluetongue (BT) is considered endemic in several regions of Brazil. The State of Sao Paulo was divided into 7 cattle production regions (circuits) according the different systems of breeding, operational and logistical capacity of the state veterinary service. At least 1 animal from each property (a total of 1,716 farms) was tested by competitive ELISA for the presence of antibodies against BTV. Seropositive sera were subsequently also tested by virus neutralization tests (VNT) using serial dilutions from 110 (cutoff) up to 1640 (in MEM). BTV4 neutralizing antibodies were detected in 86% (1,483/1,716) of the animals tested. These results show that BTV4 is endemic and widespread in the State of San Paulo and indirectly confirm that in the State there are favourable conditions for the multiplication of competent vectors. However, as no clinical signs have ever been reported in cattle in the region, BTV4 infection is likely to occur silently in the State of Sao Paulo.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças dos Bovinos
/
Bluetongue
/
Vírus Bluetongue
Tipo de estudo:
Prevalence_studies
/
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Vet Ital
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Brasil