Table 2 Nodule counts (including all removed nodules at 24 mpt), diameter (means ± standard deviations) and median age scores of female worms before and 24 months after the start of treatment in cattle, following 7 monthly treatments with ivermectin 500 μg/kg subcutaneously, doramectin 500 μg/kg subcutaneously or no treatment. Nodule numbers were adjusted for nodules removed for assay. (the number of animals in each group, n = 3 except ‡ n = 2; number of nodules per group, n = 6 except * where n = 4).

From: Repeated high doses of avermectins cause prolonged sterilisation, but do not kill, Onchocerca ochengiadult worms in African cattle