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Table 2 Geometric mean flea egg counts and percent efficacy relative to non-treated controls for cats treated with a 19.5% w/v indoxacarb topical spot-on

From: Efficacy of indoxacarb applied to cats against the adult cat flea, Ctenocephalides felis, flea eggs and adult flea emergence

  Non-treated controls1,2 Indoxacarb1,2
Day of egg collection Mean # of eggs3 Mean # of eggs Efficacy4
1 654.2 a 220.9 a 66.2
2 627.8 a 7.2 b 98.9
3 589.8 a 0.6 b 99.9
9 650.7 a 0.0 b 100.0
10 957.6 a 0.0 b 100.0
16 459.1 a 0.0 b 100.0
17 686.4 a 0.0 b 100.0
23 739.8 a 0.0 b 100.0
24 1086.1 a 0.0 b 100.0
30 566.5 a 0.0 b 100.0
31 732.1 a 0.1 b 99.9
37 491.2 a 0.7 b 99.9
38 577.9 a 0.1 b 99.9
44 229.7 a 9.7 b 95.8
45 508.4 a 6.8 b 98.7
  1. 1Each of 8 cats in the control group received no treatment. Each of 8 cats in the 19.5% w/v indoxacarb group were administered the topical spot-on according to label directions on Day 0.
  2. 2 Each cat was infested with 50 adult Ctenocephalides felis from the KS1 strain on days -2, 7, 14, 21, 28, 35 & 42.
  3. 3Geometric mean # of eggs recovered from cats per treatment group.
  4. 4% efficacy = ((geometric mean # eggs control-geometric mean # eggs treatment)/geometric mean # eggs control) × 100.
  5. a,b Geometric means across rows with unlike letter superscripts are significantly different (P < 0.001).