Table 1.

Mean attachment rate of Ixodes ricinus ticks in untreated control groups at each study assessment

		Day of study	Mean infestation rate (%)
Group 1a	Tick count 4 h after treatment, before incubation	0	55.4
	Tick count 8 h after infestations, before incubation	7	50.8
		14	56.3
		21	40.4
		28	35.4
		35	29.2
Group 2b	Tick count 8 h after treatment, before incubation	0	62.9
	Tick count 12 h after infestations, before incubation	7	49.6
		14	45.4
		21	42.9
		28	45.8
		35	34.6

^aFor Group 1, 4-h counts were completed only on Day 0, and 8-h counts were from 7 to 35 days

^b For Group 2, 8-h counts were completed only on Day 0, and 12-h counts were from 7 to 35 days