Table 1.

Efficacy of a fipronil-permethrin combination (Frontect®) against Ctenocephalides canis flea challenges in dogs

Counts on dogs at 1 h post-infestation (PI)
Groups		Day 2	Day 7	Day 14	Day 21	Day 28
Treated (6 dogs)	GM	2.97	0.98	7.09	23.89	39.08
Control (6 dogs)	GM	84.98	88.99	89.12	80.23	88.26
	p value	0.004922	0.004772	0.004998	0.004998	0.01027
	%Efficacy	96.5	98.9	92.0	70.2	55.7
Counts on dogs at 6 h PI
		Day 2	Day 7	Day 14	Day 21	Day 28
Treated	GM	0.00	0.00	0.00	0.00	0.74
Control	GM	73.22	81.64	81.01	68.10	79.91
	p value	0.002725	0.002778	0.002778	0.002725	0.004698
	%Efficacy	100.0	100.0	100.0	100.0	99.1
Counts on dogs at 24 h PI
Treated	GM	0.00	0.00	0.00	0.00	0.00
Control	GM	66.76	77.63	73.61	64.32	76.30
	p value	0.002778	0.002725	0.002778	0.002778	0.002778
	%Efficacy	100.0	100.0	100.0	100.0	100.0

GM = geometric mean. Table lines in Bold = Result lines highlighted.