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. 2018 Mar 2;14:65. doi: 10.1186/s12917-018-1388-1

Fig. 1.

Fig. 1

Study area of the 2015 BTV seroprevalence survey in France. In colour, the départements (thin black lines) and regions (thick black lines) included in the survey. In grey, départements excluded from the survey because of the low number of cattle or BTV-1 circulation in 2007-2008 to remove the effects of past BTV-1 circulation on the antibody response of cattle to BTV-8