Table 3 Mean adult heartworm counts and percentage reductions at necropsy (compared with control) after treatment with a single SC dose of either PH 6 (0.17 mg/kg) or PH 12 (0.5 mg/kg) or a single oral treatment with moxidectin (0.25 mg/kg) on Day 0

Control¹

Mean

Mean

% Reduction

7.7

7.7

15.3^a

PH 6¹

8.2

8.5

16.7^a

0%

0%

0%

Control²

Mean

Mean

% Reduction

8.7

10.0

18.7^a

PH 12²

7.7

6.5

14.9^a

5%

30%

19%

Control²

Mean

Mean

% Reduction

8.7

10.0

18.7^a

Oral Moxidectin (0.25 mg/kg) ²

8.3

7.7

16.0^a

4%

23%

14%