Table 3.

Herd level variation in fluke infection status, with herds categorised as exposed (with at least one infected animal culled in a given year) or non-exposed (without any culled animals with evidence of fluke infection at post-mortem) across years (2011–2013) in Northern Ireland

Herd fluke status	2011	2012	2013	Total
Non-Exposed	4,890	5,346	4,502	14,738
(%)	35.16	39.15	36.20	36.85
Exposed	9,017	8,309	7,933	25,259
(%)	64.84	60.85	63.80	63.15
Total	13,907	13,655	12,435	39,997