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Experiment 2
Are sheep at risk from grazing
pasture contaminated with goat-
derived IVM-resistant O.
circumcincta ?
Split the paddocks from Exp 1 into
two and crossed half goats onto
sheep pasture and vice versa
IVM resistance rapidly re-emerged
in all goat groups whether they were
previously goat or sheep paddocks
IVM resistance emerged in sheep on
level of resistance never as high
in sheep as in goats
IVM efficacy almost never < 90% in
sheep on sheep-paddocks