Table 2.

Efficacy of a new combination of fipronil and permethrin against Rhipicephalus sanguineus (Study B)

Study day	Geometric mean of live ticks
	Untreated control dogs (n = 6)	Treated dogs (n = 6)	Efficacy (%)
2	35.9	2.0	94.4*
9	27.0	0.0	100.0*
16	33.1	0.0	100.0*
23	38.7	0.5	98.7*
30	32.0	0.6	98.0*

*Significant difference between the tick population means of the treated and control groups (p ≤ 0.005).