spatial patterns of bovine corona virus and bovine respiratory syncytial virus in the swedish beef cattle population牛冠状病毒的空间模式和牛呼吸道合胞体病毒瑞典肉牛人口.pdf
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Beaudeau et al. Acta Veterinaria Scandinavica 2010, 52:33
/content/52/1/33
R E S E A R C H Open Access
Research
Spatial patterns of Bovine Corona Virus and Bovine
Respiratory Syncytial Virus in the Swedish beef
cattle population
1,2,3,4 4 4 5
Francois Beaudeau* , Camilla Björkman , Stefan Alenius and Jenny Frössling
Abstract
Background: Both bovine coronavirus (BCV) and bovine respiratory syncytial virus (BRSV) infections are currently
wide-spread in the Swedish dairy cattle population. Surveys of antibody levels in bulk tank milk have shown very high
nationwide prevalences of both BCV and BRSV, with large variations between regions. In the Swedish beef cattle
population however, no investigations have yet been performed regarding the prevalence and geographical
distribution of BCV and BRSV. A cross-sectional serological survey for BCV and BRSV was carried out in Swedish beef
cattle to explore any geographical patterns of these infections.
Methods: Blood samples were collected from 2,763 animals located in 2,137 herds and analyzed for presence of
antibodies to BCV and BRSV. Morans I was calculated to assess spatial autocorrelation, and identification of
geographical cluster was performed using spatial scan statistics.
Results: Animals detected positive to BCV or BRSV were predominately located in the central-western and some
southern parts of Sweden. Morans I indicated global spatial autocorrelation. BCV and BRSV appeared to be spatially
related: two areas in southern Sweden (Skaraborg and Skåne) had a significantly higher prevalence of BCV (72.5 and
65.5% respectively); almost the same two areas were identified as being high-prevalence clusters for BRSV (69.2 and
66.8% respectively). An area in south-eas
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