Table 2.

Antibacterial activity test using E.coli and S. aureus. The viable bacteria were monitored by counting the number of colony-forming units (CFU).

Sample code	Duration of treatment (h)
	t0			t1			t3
	CFU ml-1	N/N0	Reduction in viability (%)	CFU ml-1	N/N0	Reduction in viability (%)	CFU ml-1	N/N0	Reduction in viability (%)
E. coli
0	1.5 × 108	1	0	1.5 × 108	0	100	1.5 × 108	0	0
1	1.5 × 108	1	0	0	–	100	0	–	100
2	1.5 × 108	1	0	0	–	100	0	–	100
3	1.5 × 108	1	0	0	–	100	0	–	100
4	1.5 × 108	1	0	0	–	100	0	–	100
5	1.5 × 108	1	0	0	–	100	0	–	100
6	1.5 × 108	1	0	0	–	100	0	–	100
7	1.5 × 108	1	0	0	–	100	0	–	100
8	1.5 × 108	1	0	0	–	100	0	–	100
S. aureus
0	2 × 108	1	0	2 × 108	0	0	2 × 108	0	0
1	2 × 108	1	0	1.5 × 107	7.5 × 10–2	92.50	0	–	100
2	2 × 108	1	0	1 × 105	5 × 10–4	99.95	0	–	100
3	2 × 108	1	0	2 × 105	1 × 10–3	99.90	0	–	100
4	2 × 108	1	0	1 × 106	5 × 10–3	99.50	0	–	100
5	2 × 108	1	0	2 × 106	1 × 10–2	99.00	0	–	100
6	2 × 108	1	0	1.5 × 106	7.5 × 10–3	99.25	0	–	100
7	2 × 108	1	0	1.5 × 106	7.5 × 10–3	99.25	0	–	100
8	2 × 108	1	0	2 × 106	1 × 10–2	99.00	0	–	100

N/No: survival fraction, Sample 0 (Uncoated fabric), Samples 1–4 and 5–8 (NS-coated fabrics at 2, 10, 20, and 50 mM silver nitrate concentrations, and 25 and 50 min sonication time, respectively).