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Table 5 The remaining percentage (± standard deviation) of the imidacloprid and flumethrin start amount in 177 collars worn by laboratory cats and dogs for different durations

From: The synergistic action of imidacloprid and flumethrin and their release kinetics from collars applied for ectoparasite control in dogs and cats

Bayer Animal Health Study number No. of animals Wearing time [days] mean % of initial amount
    Imidacloprid Flumethrin
CAT STUDIES = small collar
ID 35118 3 2 94.6 ± 0.67 99.7 ± 0.79
  3 7 89.6 ± 0.48 98.3 ± 0.44
  3 14 85.5 ± 4.32 97.0 ± 1.25
  3 28 81.7 ± 1.32 97.7 ± 0.75
  3 56 72.6 ± 2.61 95.0 ± 0.22
  3 84 70.9 ± 1.81 91.7 ± 2.27
ID 35638 8 30 79.7 ± 2.95 97.0 ± 0.64
ID 33697 30 60 77.7 ± 8.30 92.5 ± 3.13
ID 35121 8 238 74.7 ± 4.53 81.6 ± 5.39
ID 35635 10 241 61.4 ± 2.50 72.7 ± 2.52
ID 35632 10 240 57.9 ± 3.27 85.6 ± 2.28
ID 35630 9 238 59.7 ± 3.12 84.9 ± 2.23
mean cat 8 months 37 238-240 59.7 ± 3.0 81.9 ± 6.0
DOG STUDIES = large collar
ID 35637 8 30 81.7 ± 2.23 96.5 ± 2.97
ID 33692 32 60 79.1 ± 4.62 97.7 ± 2.71
ID 33691 10 90 74.7 ± 4.53 81.6 ± 5.39
ID 35117 6 91 72.0 ± 2.32 88.8 ± 5.92
ID 35631 10 245 60.5 ± 3.96 80.8 ± 5.44
ID 35120 8 238 62.4 ± 6.21 70.4 ± 3.47
ID 35636 10 240 68.7 ± 2.03 80.8 ± 7.40
Mean dog 8 months 28 238-245 64.0 ± 5.40 77.8 ± 7.2
Mean total 8 months 65 238-245 61.6 ± 4.70 80.1 ± 6.9