Table 5.

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

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]