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Table 6 Study 2: Mean numbers of ticks on treated dogs 48 h after treatment and 18 h after each re-infestation with Rhipicephalus sanguineus

From: Efficacy of slow-release collar formulations of imidacloprid/flumethrin and deltamethrin and of spot-on formulations of fipronil/(s) - methoprene, dinotefuran/pyriproxyfen/permethrin and (s) –methoprene/amitraz/fipronil against Rhipicephalus sanguineus and Ctenocephalides felis felis on dogs

Day

Mean numbers of ticks (18 h after re-infestation)

Untreated controls (Group 1)

Imidacloprid/

flumethrin

(Group 2)

(S)-methoprene/

amitraz/fipronil (Group 3)re-treatment: Day 35

(S)-methoprene/

amitraz/fipronil

(Group 4)

2*

20.5

4.5

1.6

-

8

25.4

0.3

0.0

-

15

30.9

0.1

0.6

-

22

31.5

0.1

1.9

-

29

34.4

0.3

4.6

-

36

34.9

0.4

0.5**

-

43

32.1

0.4

0.0

0.4

50

33.6

0.1

1.0

2.3

57

35.8

0.4

2.5

3.9

64

36.9

0.8

5.8

12.0

71

33.1

0.1

9.0

15.1

  1. * Tick counts 48 h after treatment.
  2. ** Tick counts 18 h after re-treatment.