TABLE 1.

Results of a control experiment without chlorine dioxide gas decontamination^a

Sampling method	Material	Culture analysis (CFU/sample)		QPCR analysis (templates/sample)
		Pre	Post	Pre	Post
Heavy wipe	Vinyl tile	6.43 × 105	5.41 × 105	3.37 × 105	4.47 × 105
	Wood laminate	7.97 × 105	8.43 × 105	1.42 × 105	4.52 × 105
	Metal cabinet	5.62 × 105	6.77 × 105	2.50 × 105	4.39 × 105
Swipe	Vinyl tile	7.45 × 105	7.79 × 105	6.15 × 105	9.48 × 105
	Wood laminate	1.56 × 106	7.85 × 105	6.16 × 104	7.54 × 105
	Metal cabinet	7.81 × 105	ND	5.95 × 105	6.66 × 105
SSP kit	Vinyl tile	4.55 × 105	5.16 × 105	1.04 × 106	1.23 × 106
	Wood laminate	9.06 × 105	4.02 × 105	1.26 × 106	1.33 × 106
	Metal cabinet	5.83 × 105	5.20 × 105	1.15 × 106	1.22 × 106

^aData were obtained in a control experiment with no chlorine dioxide gas decontamination to determine if physical factors during treatment affected postdecontamination results. The control experiment was conducted in an identical manner as the other B. atrophaeus decontamination trials, with the exception that chlorine dioxide gas was not released into the room. Surface samples (929 cm², [1 ft²]; n = 1 for each material) were collected with Heavy Wipes, swipes, and SSP kits prior to treatment (Pre) and posttreatment (Post). Culture and QPCR results were obtained for the detection of B. atrophaeus from surfaces in the experimental room. ND, not determined.