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

BMC Veterinary Research

Table 3 BTV-8 seroprevalence in French cattle in the winter of 2015-2016 per birth cohort and the département’s BTV-8 status

Birth cohort	BTV-8 non-infected départements					BTV-8 infected départements
	No. analyses	ELISA positive		ELISA doubtful		No. analyses	ELISA positive		ELISA doubtful
	No. analyses	No.	% (CI 95%)	No.	% (CI 95%)	No. analyses	No.	% (CI 95%)	No.	% (CI 95%)
< July 2008	1310	1254	95.7 [94.5 - 96.8]	4	0.3 [0.1 - 0.8]	866	814	94.0 [92.2 - 95.5]	2	0.2 [0 - 0.8]
July 2008 - June 2009	467	368	78.8 [74.8 - 82.4]	16	3.4 [2.0 - 5.5]	226	163	72.1 [65.8 - 77.9]	9	4.0 [1.8 - 7.4]
July 2009 - June 2010	617	194	31.4 [27.8 - 35.3]	23	3.7 [2.4 - 5.5]	317	108	34.1 [28.9 - 39.6]	6	1.9 [0.7 - 4.1]
July 2010 - June 2011	718	76	10.6 [8.4 - 13.1]	7	1.0 [0.4 - 2.0]	438	72	16.4 [13.1 - 20.2]	10	2.3 [1.1 - 4.1]
July 2011 - June 2012	1134	37	3.3 [2.3 - 4.5]	5	0.4 [0.1 - 1.0]	710	57	8.0 [6.1 - 10.3]	13	1.8 [1.0 - 3.1]
July 2012 - June 2013	4342	37	0.9 [0.6 - 1.2]	15	0.3 [0.2 - 0.6]	3179	75	2.3 [1.9 - 2.9]	2	0.1 [0 - 0.2]
> June 2013*	5428	25	0.5 [0.4 - 0.7]	25	0.5 [0.3 - 0.7]	3891	102	2.6 [2.1 - 3.2]	5	0.1 [0 - 0.3]

ISSN: 1746-6148