Table 4.

Assessment of surface contamination by cultural technique (RODAC) and ATP-bioluminescence assay. Comparison of the different sampled surfaces

Sampled surfaces	TVC (RODAC) (CFU/plate)				ATP-Bioluminescence assay (RLU/100 cm2)
	Geometric mean	CI 95%	Median	Range	Geometric mean	CI 95%	Median	Range
medical anaesthesia trolley	2.1	1.4–3.0	1	0–14	42.2	24.7–72.3	38	6–510
nurse’s computer touch screen	1.1	1.0–1.4	0	0–3	29.9	17.8–50.2	30	4–480
operating table	1.7	1.2–2.5	0	0–13	35.7	21.6–58.9	31	5–468
vitals monitor	1.4	1.1–1.7	0	0–3	29.6	19.7–44.2	32	5–172
anaesthetist’s computer touch screen	1.6	1.1–2.4	0	0–16	27.2	18.2–40.8	26	5–102
surgical lighting	2.6	1.6–4.1	1	0–41	60.5	37.4–98.1	42.5	13–357
Instrument table	2.4	1.7–3.4	1	0–10	18.4	12.4–27.2	13.5	4–106

CI: Confidence Interval