A field case of ivermectin resistance in Ostertagia of sheep. [Short contribution].
1994
Swan N. | Gardner J.J. | Besier R.B. | Wroth R.
The first field case detected on a commercial farm in Australia of ivermectin resistance in Ostertagia in sheep is described. Resistance appeared to have developed despite a relatively small number of exposures of the nematode population to ivermectin.
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