Figure 1From: Age, season and spatio-temporal factors affecting the prevalence of Echinococcus multilocularis and Taenia taeniaeformis in Arvicola terrestrisStudy areas in the canton of Zurich, Switzerland. Areas 1-3 are situated along the urban periphery of the city of Zurich, area 4 is located in the the municipality of Rifferswil. Number of investigated water voles (Arvicola terrestris): N = 99 (area 1), N = 28 (area 2), N = 125 (area 3), N = 604 (area 4).Back to article page