Figure 2
The number of holdings and cattle. The number of active holdings (having at least one animal) and the number of cattle in Sweden during the period 2005-07-01 to 2013-12-31. Data is from the national cattle database managed by the Swedish Board of Agriculture. The number of cattle is grouped by age category; Calves 0–119 days, Young stock 120–364 days and Adults older than 364 days. The dashed line is a loess smoother. The data was used in a simulation to explore the spread of VTEC O157 in the complete Swedish cattle population.