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Table 5 RT-PCR results for cattle per birth cohort on farms found to be infected from September to October 2015 in France

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

Birth period No. analyses No. positives Proportion of positive results (% [95 CI])
< July 2008 201 0 0 [0 - 1.8]
July 2008 - June 2009 66 3 4.5 [0.9 - 12.7]
July 2009 - June 2010 89 6 6.7 [2.5 - 14.1]
July 2010 - June 2011 113 10 8.8 [4.3 - 15.7]
July 2011 - June 2012 177 24 13.5 [8.9 - 19.5]
July 2012 - June 2013 206 39 18.9 [13.8 – 25.0]
July 2013-September 2014 180 24 13.3 [8.7 – 19.2]