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Table 2 Range, arithmetic mean live fed-mosquito counts and percent efficacy relative to the untreated control group at the different timepoints (24 h, 48 h, 72 h, 96 h and 120 h) after exposure for all study days for dogs treated orally with Simparica or Simparica Trio in study 2

From: Insecticidal activity of Simparica and Simparica Trio against Aedes aegypti in dogs

Time post-exposure (hours)

  

Study day

  

1

7

14

21

28

35

24

Untreated control

Range

35–46

21–47

37–49

36–48

42–50

35–50

Arithmetic mean

40.8

37.1

42.9

43.5

46.3

42.0

Simparica

Range

0–8

3–6

2–8

0–9

3–14

7–43

Arithmetic mean

4.1

4.3

5.8

4.9

8.6

20.3

% Reduction

89.9*

88.6*

86.6*

88.8*

81.4*

51.8*

Simparica Trio

Range

3–9

0–6

3–8

4–12

12–46

8–45

Arithmetic mean

5.4

2.9

4.8

7.5

25.5

31.9

% Reduction

86.8*

92.3*

88.9*

82.8*

44.9*

24.1

48

Untreated control

Range

35–46

19–46

35–49

35–48

41–50

35–50

Arithmetic mean

40.8

36.3

42.3

43.1

45.8

41.9

Simparica

Range

0–0

0–0

0–2

0–1

0–1

0–3

Arithmetic mean

0.0

0.0

0.4

0.3

0.3

0.5

% Reduction

100*

100*

99.1*

99.4*

99.5*

98.8*

Simparica Trio

Range

0–1

0–1

0–1

0–1

0–32

0–42

Arithmetic mean

0.1

0.1

0.1

0.3

5.1

15.1

% Reduction

99.7*

99.7*

99.7*

99.4*

88.8*

63.9*

72

Untreated control

Range

35–46

19–46

34–49

35–48

40–50

35–50

Arithmetic mean

40.6

36.1

42.1

43.0

45.4

41.9

Simparica

Range

0–0

0–0

0–2

0–1

0–1

0–1

Arithmetic mean

0.0

0.0

0.4

0.3

0.3

0.1

% Reduction

100*

100*

99.1*

99.4*

99.4*

99.7*

Simparica Trio

Range

0–1

0–1

0–1

0–1

0–6

0–36

Arithmetic mean

0.1

0.1

0.1

0.3

1.0

9.3

% Reduction

99.7*

99.7*

99.7*

99.4*

97.8*

77.9*

96

Untreated control

Range

35–46

19–46

34–49

35–48

40–50

34–50

Arithmetic mean

40.5

35.8

41.5

42.8

45.4

41.4

Simparica

Range

0–0

0–0

0–2

0–1

0–1

0–1

Arithmetic mean

0.0

0.0

0.4

0.3

0.3

0.1

% Reduction

100*

100*

99.1*

99.4*

99.4*

99.7*

Simparica Trio

Range

0–1

0–1

0–1

0–1

0–3

0–29

Arithmetic mean

0.1

0.1

0.1

0.3

0.6

7.8

% Reduction

99.7*

99.7*

99.7*

99.4*

98.6*

81.3*

120

Untreated control

Range

35–46

19–46

34–49

34–48

37–50

34–49

Arithmetic mean

40.5

35.8

41.5

42.3

44.8

41.1

Simparica

Range

0–0

0–0

0–2

0–1

0–1

0–1

Arithmetic mean

0.0

0.0

0.4

0.3

0.3

0.1

% Reduction

100*

100*

99.1*

99.2*

99.4*

99.7*

Simparica Trio

Range

0–1

0–1

0–1

0–1

0–3

0–28

Arithmetic mean

0.1

0.1

0.1

0.3

0.7

7.6

% Reduction

99.7*

99.7*

99.7*

99.4*

98.4*

81.5*

  1. * P < 0.05 (significantly different from the placebo)