From: Liver fluke (Fasciola hepatica) infection in cattle in Northern Ireland: a large-scale epidemiological investigation utilising surveillance data
2011
2012
2013
Mean
Mean within-herd %
24.60 %
21.38 %
23.55 %
23.18 %
Std. Dev.
0.281
0.270
0.274
0.276
Total herds
13,907
13,655
12,435
13,332