All adult horses on a premises should undergo a minimum of three faecal worm egg counts per year during the grazing season, at least two months apart (April/ May, June/July, August September in northern Europe). Any horse with a faecal worm egg count greater than 300epg should be treated with the advice of a veterinary surgeon or SQP using current industry guidelines.
Adult horses should undergo further testing 14 days later to ensure drug efficacy
Where more than 10% of a population has a high burden, Egg Reappearance Testing should be established in a subset of the highest shedders to identify early development of resistance
A diagnosis of parasite resistance is made on the basis of early egg reappearance times or based on the persistence of susceptible parasite 14 days after dosing using a fecal worm egg count reduction test.
Foals should be tested from 6-9 months to guide appropriate medication based on current industry guidelines.
