The efficacy of Advantix® to prevent transmission of Ehrlichia canis to dogs by Rhipicephalus sanguineus ticks

Open Access

Table 1.

Tick counts on dogs 48 h after environmental challenges by treatment group and percentage efficacies.

	Group 1 – Control group						Group 2 – Advantix-treated group
	Live ticks			Dead ticks			Live ticks			Dead ticks
Day	Free	Att; Ue	Att; E	Free	Att; Ue	Att; E	Free	Att; Ue	Att; E	Free	Att; Ue	Att; E	Efficacy (%) based on arith. mean (geo. mean#)
+9*	0.0 (0.0)	7.0 (6.7)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.5 (0.3)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	92.9 (96.1)
+16*	0.0 (0.0)	9.5 (8.0)	2.8 (2.1)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.2 (0.1)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	98.6 (98.9)
+23*	0.0 (0.0)	10.3 (11.1)	1.8 (1.6)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.3 (0.2)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	97.3 (98.3)
+30	0.0 (0.0)	18.5 (17.7)	2.3 (2.1)	0.0 (0.0)	0.5 (0.3)	0.8 (0.7)	0.0 (0.0)	0.5 (0.3)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	0.0 (0.0)	97.6 (98.3)

*In situ counts. #The geometric means of Group 2 differed statistically significantly (p < 0.05) from those in Group 1 in all cases. Att = Attached; Ue = Unengorged; E = Engorged; Geo = geometric; Arith = Arithmetic.

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