TABLE 2. Dye-uptake technique. Descriptive statistics for optical density.

Groups	N	Time
		0 h				24h
		Mean	Median	SD	% viable cells	Mean	Median	SD	% viable cells
CC	24	0.547a	0.57	0.062	100.0	0.648a	0.690	0.142	100.0
C-	24	0.527	0.545	0.076	96.3	0.622	0.678	0.164	95.9
C+	24	0.257	0.251	0.035	46.9	0.306	0.307	0.073	47.2
T	24	0.526a	0.538	0.052	96.1	0.598a	0.696	0.234	92.2
U1	24	0.091b	0.089	0.006	16.6	0.115b	0.087	0.077	17.7
U2	24	0.048c	0.048	0.002	8.7	0.074cb	0.074	0.007	11.4
U3	24	0.052dc	0.05	0.007	9.5	0.080dbc	0.079	0.005	12.3
U4	24	0.049ecd	0.049	0.002	8.9	0.080ebcd	0.078	0.005	12.3
U5	24	0.073fbcde	0.071	0.008	13.3	0.088fbcde	0.087	0.010	13.5
U6	24	0.080gbfcde	0.078	0.010	14.6	0.114gbcdef	0.106	0.024	17.5

N=24. Values followed by same letters are not significantly different (p>0.05) for the same time point. SD: standard deviation.