A field trial of spinosad for the treatment and prevention of flea infestation in shepherd dogs living in close proximity to flea-infested sheep

Table 2 Flea counts, number of dogs with zero flea count and percent efficacy of spinosad

	Day 0		Day 14		Day 28		Day 56		Day 84
	Flea counts
Group	A	B	A	B	A	B	A	B	A	B
Range	24-73	31-76	0-4	22-72	0	21-69	0	24-79	0	20-86
Median	48	56	0	46	0	56	0	53	0	64
Arithmetic mean	49.27	53	0.6	47	0	51.27	0	51.33	0	58.67
Geometric mean	47.14	51.05	0.25	44.34	0	48.82	0	48.38	0	54.57
	Number (%) of dogs with zero flea counts
Group A (n = 15)	0 (0 %)		12 (80 %)		15 (100 %)		15 (100 %)		15 (100 %)
Group B (n = 15)	0 (0 %)		0 (0 %)		0 (0 %)		0 (0 %)		0 (0 %)
	Percent efficacy of spinosad
Arithmetic mean			98.72 %		100 %		100 %		100 %
Geometric mean			99.44 %		100 %		100 %		100 %

Range, median, arithmetic and geometric means of flea counts of spinosad-treated (group A) and of placebo-treated (group B) dogs, number of group A and group B dogs with zero flea counts at the beginning of the trial (day 0) and after 14, 28, 56 and 84 days and percent efficacy of spinosad

ISSN: 1756-3305