Table 5.

Results of a toxicity assay where I. scapularis nymphs of variable origin were held in continuous contact with a non-treated filter paper or textile surface or a permethrin-treated textile for 1 min and subsequently assessed for vigor at 1 and 24 h after exposure.

Tick source and vigor	1 h after exposure		24 h after exposure
	Non-treated control surface	Permethrin-treated textile	Non-treated control surface	Permethrin-treated textile
Field-collected nymphs (CT-field)
No. examined	10	10	10	10
No. (%) displaying any movement	10 (100)	3 (30)	10 (100)	2 (20)
No. (%) displaying normal movement and response to stimulusa	10 (100)	3 (30)	10 (100)	2 (20)
1st laboratory generation nymphs (CT15)b
No. examined	40	40	40	40
No. (%) displaying any movement	40 (100)	38 (95)	40 (100)	12 (30)
No. (%) displaying normal movement and response to stimulusa	40 (100)	1 (2)	40 (100)	6 (15)
1st laboratory generation nymphs (MN15)
No. examined	10	10	20	20
No. (%) displaying any movement	10 (100)	1 (10)	20 (100)	4 (20)
No. (%) displaying normal movement and response to stimulusa	10 (100)	0 (0)	20 (100)	1 (5)
2nd laboratory generation nymphs (CT14)
No. examined	9	10	9	10
No. (%) displaying any movement	9 (100)	2 (20)	9 (100)	2 (20)
No. (%) displaying normal movement and response to stimulusa	9 (100)	0 (0)	9 (100)	0 (0)
3rd laboratory generation nymphs (CT13)
No. examined	10	10	10	10
No. (%) displaying any movement	10 (100)	8 (80)	10 (100)	2 (20)
No. (%) displaying normal movement and response to stimulusa	10 (100)	0 (0)	10 (100)	1 (10)

^aExcluding ticks capable of some movement of the legs but not able to right themselves or walk and ticks capable of righting themselves but not able to move in a coordinated way or orient toward a stimulus.

^bIncluding data from Table 4.