The number of reactor animals taken from farms in NI in March was the highest monthly total in over 13 years, with 1,583 reactors identified, the latest figures from DAERA show.In the first quarter of 2017, a total of 4,384 reactors have been taken off farms, representing a 50% increase on the same period last year. Herd incidence (the number of new reactor herds as a percentage of total herds tested) hit 8.23% in March, the highest rate for 12 years.