tailieunhanh - Báo cáo thú y: "Spatial patterns of Bovine Corona Virus and Bovine Respiratory Syncytial Virus in the Swedish beef cattle population"

Tuyển tập các báo cáo nghiên cứu về bệnh học thý y được đăng trên tạp chí Acta Veterinaria Scandinavica cung cấp cho các bạn kiến thức về bệnh thú y đề tài: Spatial patterns of Bovine Corona Virus and Bovine Respiratory Syncytial Virus in the Swedish beef cattle population. | Beaudeau et al. Acta Veterinaria Scandinavica 2010 52 33 http content 52 1 33 AVS ACTAVETERINARIA Scatand n SCANDINAVICA RESEARCH Open Access Spatial patterns of Bovine Corona Virus and Bovine Respiratory Syncytial Virus in the Swedish beef cattle population Francois Beaudeau 1 2 3 4 Camilla Bjorkman4 Stefan Alenius4 and Jenny Frossling5 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. Moran s 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. Moran s I indicated global spatial autocorrelation. BCV and BRSV appeared to be spatially related two areas in southern Sweden Skaraborg and Skâne had a significantly higher prevalence of BCV and respectively almost the same two areas were identified as being high-prevalence clusters for BRSV and respectively . An area in south-east Sweden Kronoberg-Blekinge had lower prevalences for both infections than expected and for BCV and BRSV respectively . Another area in middle-west Sweden Varmland-Dalarna had also a lower prevalence for BRSV . Areas with .

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