Table 1.

Number of cages that tested positive by fur pluck (FP) and fur PCR assays among treated infested, untreated infested positive control, and uninfested negative control mice

		Time (wk) past initial treatment
		0		4		8		16
		FP	PCR	FP	PCR	FP	PCR	FP	PCR
Juvenile mice	Treated (6 cages)	6	6	6	2	0	2	0	0
	Positive controls (2 cages)	2	2	2	2	2	2	1	2
	Negative controls (8 cages)	0	0	0	0	0	0	0	1
Adult mice	Treated (6 cages)	5	6	0	2	0	2	0	0
	Positive controls (2 cages)	1	2	0	2	2	2	2	2
	Negative controls (6 cages)	0	1	0	0	0	0	0	1

Juvenile mice were 5 wk old at the start of the study; adult mice were 28 wk old. Selamectin was administered to treated cages at 0 (initial treatment) and 4 wk.