Seroprevalence of Schmallenberg Virus Antibodies among Dairy Cattle, the Netherlands, Winter 2011–2012
Figure 2. . . . Geographic distribution of dairy herds sampled in study of Schmallenberg virus seroprevalence with positive results (>1 animals sampled tested seropositive; red dots) and negative results (all animals sampled tested seronegative; yellow dots), the Netherlands, 2011–2012. Cattle density is indicated by gray shading; blue outlines denote regional borders.