Table 6.

In vitro efficacy of UV-C for a preselected set of micro-organisms under optimal and suboptimal circumstances

	Micro-organism	Optimal circumstances; effect in log10 reduction, median (range)	Suboptimal circumstances; effect in log10 reduction, median (range)	N (ref)
Viruses	Norovirus
Bacteria	Acinetobacter	≥ 4 (≥ 4–>8)	3 (< 1–4)	6 [58, 61–65]
	CPE	4–5	1–5	1 [66]
	ESBL	> 8	> 3	2 [62, 65]
	MRSA	4 (2–9)	< 3 (< 1–>6)	13 [58, 60–63, 65–72]
	VRE	3.9 (2–>8)	< 3 (< 1–>4)	10 [58, 60–63, 67–71]
Spores	C. difficile	2.5 (1–>5)	< 2 (0–>3)	11 [31, 57, 60, 61, 66–72]
Yeasts	C. auris	> 5 (3.99–>6)	3.3 (< 2–>4)	4 [72–75]