Prevalence of sheep infected with classical scrapie in Great Britain, 1993-2007.
Epidemiol Infect
; 137(6): 787-91, 2009 Jun.
Article
em En
| MEDLINE
| ID: mdl-19351431
ABSTRACT
Extensive surveillance for classical scrapie has been carried out in Great Britain since 1993, the results of which can be used for monitoring the effect of control measures introduced since 2001. A back-calculation approach was used to estimate the prevalence of sheep infected with classical scrapie, which integrates data on reported clinical cases (1993-2007) and the results of fallen stock and abattoir surveys (2002-2007). The prevalence of classical scrapie in GB was fairly constant until 2003, although the estimates depended on assumptions made about the performance of diagnostic tests used in the surveys. If infected animals could be detected in the final quarter of the incubation period, the estimated prevalence was 0.6-0.7%, while if they could be detected in the final half of the incubation period, it was 0.3-0.4%. Between 2003 and 2007 the prevalence declined by around 40%, and the magnitude of the reduction was independent of assumptions made about the diagnostic tests.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Scrapie
Tipo de estudo:
Prevalence_studies
/
Risk_factors_studies
/
Screening_studies
Limite:
Animals
País/Região como assunto:
Europa
Idioma:
En
Revista:
Epidemiol Infect
Assunto da revista:
DOENCAS TRANSMISSIVEIS
/
EPIDEMIOLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Reino Unido