Fig. 2

No. of infected bank voles trapped per 100 trap nights in each of the 58 1-ha trapping plots in spring over the course of a complete bank vole population cycle; the only 4-yr. cycle (increase phase to low phase: a-d: 2009–2012). Six plots encompassed water bodies or other untrappable sites and were not sampled. In 2009 and 2012, infected bank voles were trapped in one plot only