Laboratory assessment of the anti-feeding effect for up to 12 months of a slow release deltamethrin collar (Scalibor®) against the sand fly Phlebotomus perniciosus in dogs

Table 2 Mean counts of live and moribund female sand flies and percent reductions of sand flies on deltamethrin collar-treated dogs compared to untreated control dogs. Collars were placed on dogs on Day 0

Day	Control		Deltamethrin collar		Comparison		% Efficacy AM (GM)
Day	AM ± SD	GM	AM ± SD	GM	χ ² -value ^b F-value^c	P-value	% Efficacy AM (GM)
7^a	82.3 ± 5.6	82.1	26.6 ± 9.6	25.2	F_(1, 10) = 182.0	<0.0001	69 (71)
28	81.1 ± 3.2	81.1	21.4 ± 10.1	18.9	χ² = 11.3108, df = 1	0.0008	74 (77)
56	85.0 ± 2.4	85.0	40.6 ± 14.7	38.5	χ² = 11.3947, df = 1	0.0007	56 (59)
84	85.3 ± 4.3	85.2	46.1 ± 9.5	45.2	χ² = 11.3274, df = 1	0.0008	46 (47)
112	82.3 ± 3.2	82.2	67.4 ± 10.4	66.6	F_(1, 14) = 14.87	0.0017	18 (19)
140	85.8 ± 3.6	85.7	71.8 ± 14.4	70.2	χ² = 6.1361, df = 1	0.0132	16 (18)
168	83.1 ± 2.0	83.1	75.8 ± 5.7	75.6	χ² = 7.2357, df = 1	0.0071	9 (9)
196	84.3 ± 1.8	84.2	81.0 ± 4.3	80.9	χ² = 4.4843, df = 1	0.0342	4 (4)
224	83.8 ± 1.5	83.7	80.4 ± 3.9	80.3	χ² = 3.4436, df = 1	0.0635	4 (4)
252	83.0 ± 1.3	83.0	81.3 ± 6.6	81.0	χ² = 0.1424, df = 1	0.7059	2 (2)
280	83.4 ± 1.6	83.4	82.4 ± 2.0	82.4	F_(1, 14) = 1.22>	0.2872	1 (1)
308	83.4 ± 2.8	83.3	81.3 ± 1.8	81.2	F_(1, 14) = 3.27	0.0922	3 (3)
336	80.9 ± 1.2	80.9	81.1 ± 1.5	81.1	F_(1, 14) = 0.14	0.7179	0 (0)
364	82.9 ± 2.4	82.8	82.1 ± 1.6	82.1	F_(1, 14) = 0.55	0.4724	1 (1)

Abbreviations: AM arithmetic mean, SD standard deviation, GM geometric mean, df degrees of freedom
^aDay 7 data for one control and three deltamethrin collar dogs were not included because their collars were damaged
^bKruskal-Wallis test
^cANOVA

ISSN: 1756-3305