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Table 1 Geometric mean (3 skin snips)O. ochengi mf density+1 per 100 mg skin in cattle following 7 monthly treatments with ivermectin 500 μg/kg subcutaneously, doramectin 500 μg/kg subcutaneously or untreated controls. Animals lost to follow-up are indicated in the table.

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

  ID 0 mpt 3 mpt 6 mpt 9 mpt 12 mpt 15 mpt 18 mpt 21 mpt 24 mpt 36 mpt
Control 17 3803 635 203 0 18 a     
  19 841 260 1515 774 1135 604 1698 185 257 c
  22 4578 1583 911 712 767 291 982 975 1462 281
Ivermectin 14 509 0 0 0 0 1 3 0 8 2
  18 671 0 0 0 0 0 2 0 0 b
  20 240 0 0 0 0 0 0 0 0 0
Doramectin 12 6901 0 0 0 0 0 0 5 16 75
  15 1607 0 0 0 0 0 0 0 0 0
  23 146 0 0 0 0 0 3 2 0 0
  1. a: Slaughtered following tetracycline therapy for dermatophilus infection, b: slaughtered due to septic arthritis, c lost to follow-up