Fig. 1From: A picture of trends in Aujeszky’s disease virus exposure in wild boar in the Swiss and European contextsMap of Switzerland showing the study units and the origin of sampled wild boar. Shades of grey refer to the landscape relief and main lakes are indicated in plain blue. Letters and transparent colored surfaces refer to the five study units: Purple, a = Geneva; Light blue, b = Jura Mountains; Orange, c = Thurgovia; Grey-blue, d = Swiss plateau; Green, e = Ticino. Sera were tested by ELISA for antibodies against ADV. Colored dots, stars and diamonds indicate the location of the sampled wild boar (2008-2013): Pink dots = seronegative; Yellow stars = seropositive; Green diamonds = doubtfulBack to article page