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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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