Table 4 Geometric and arithmetic mean (standard deviation) flea counts 4 h post-treatment (Day 0) and post-reinfestations in Study 3

 Arithmetic mean

58.5 (12.5)

73.2 (6.6)

73.8 (15.0)

68.2 (14.1)

71.8 (12.1)

 Geometric mean

57.2

72.9^a

72.4^a

67.0^b

70.9^c

 Arithmetic mean

40.2 (11.4)

28.3 (17.4)

13.8 (6.9)

23.3 (9.3)

39.0 (14.2)

 Geometric mean

38.1

24.3^a,c

12.5^a,d

21.2^b,c

36.3^c

 % Reduction from Control

33.4

66.7

82.7

68.4

48.8

 Arithmetic mean

45.7 (6.1)

50.5 (5.5)

38.0 (14.9)

39.5 (12.5)

53.0 (13.4)

 Geometric mean

45.3

50.3^c

35.4^a,d

38.0^b,c

51.3^c

 % Reduction from Control

20.7

31.1

51.1

43.2

27.7

 Arithmetic mean

49.8 (17.5)

13.0 (7.3)

10.0 (7.9)

10.0 (4.3)

28.0 (12.2)

 Geometric mean

46.5

11.4^a,c

7.1^a,d

9.2^b,c

25.8^a,c

 % Reduction from Control

18.6

84.3

90.2

86.3

63.7