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Table 4 BTV-8 seroprevalence in cattle in the winter of 2015-2016 per birth cohort and region in France

From: Estimation of French cattle herd immunity against bluetongue serotype 8 at the time of its re-emergence in 2015

Birth cohort Proportion of positive results per region (%) Proportion of doubtful results per region (%)
Median Min - Max Range Median of the 95% CI range Median Min - Max Range Median of the 95% CI range
< July 2008 96.5 85.6 - 99.1 13.5 5.7 0.0 0.0 – 2.3 2.3 2.1
July 2008 - June 2009 75.4 65.7 – 90.4 24.7 20.9 3.6 1.2 – 5.4 4.2 10.5
July 2009 - June 2010 30.1 19.5 – 53.7 34.2 19.3 3.0 0.0 – 8.3 8.3 8.5
July 2010 - June 2011 11.9 1.1 – 21.7 20.6 13.4 1.6 0.0 – 3.6 3.6 4.5
July 2011 - June 2012 5.8 0.0 – 9.6 9.6 7.2 1.0 0.0 – 1.8 1.8 4.0
July 2012 - June 2013 1.0 0.2 – 4.6 2.6 1.7 0.0 0.0 - 1.4 1.4 0.6
> June 2013* 0.7 0.0 – 4.6 4.6 1.2 0.2 0.0 - 1.4 1.4 0.6
  1. *Cattle > 12 months old