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Table 3 Geometric mean tick count and acaricidal efficacy

From: A study on the long-term efficacy of Seresto® collars in preventing Babesia canis (Piana & Galli-Valerio, 1895) transmission to dogs by infected Dermacentor reticulatus (Fabricius, 1794) ticks

Day Geometric mean Geometric mean (% efficacy) P-valuea
Group 1 Group 2
Day 30 5.8 0.4 (93.0) F(1,14) = 23.11, P = 0.0003
Day 58 4.1 0 (100) F(1,14) = 46.83, P < 0.0001
Day 86 4.9 0.1 (97.0) F(1,14) = 62.62, P < 0.0001
Day 114 8.6 0.1 (99.0) F(1,14) = 128.27, P < 0.0001
Day 142 3.1 0 (100) F(1,14) = 21.06, P = 0.0004
Day 170 4.4 0 (100) F(1,14) = 62.28, P < 0.0001
Day 198 8.7 0 (100) F(1,14) = 99.57, P < 0.0001
Day 226 5.4 0.1 (98.3) F(1,14) = 83.22, P < 0.0001
Day 231b 4.1 0.1 (97.8) F(1,14) = 21.48, P = 0.0004
  1. aP-value: One-way ANOVA with a treatment effect presented as test statistic (F-value) plus degrees of freedom with exact P-value
  2. bRemoval count on Day 231, in situ count on all other assessment days
  3. Note: Group 1: Non-treated control dogs; Group 2: Seresto®-treated dogs