Table 3.

Results of antibacterial activity tests.

			0 Contact Time	After 24 h
Test towards Staphylococcus aureus	Neat PP	Trial 1	4.4 × 04	1.3 × 107
		Trial 2	4.4 × 104	9.2 × 106
		Average CFU	4.4 × 104	1.1 × 107
		Log(average CFU)	4.9	7.1
		Growth value F	2.5
	5 wt.% loaded	Trial 1	1.8 × 105	<20 *
		Trial 2	1.3 × 105	<20 *
		Average CFU	1.6 × 105	<20
		Log(average CFU)	5.2	<1.3
		Growth value G	<−3.9
	$A=F-G$		>6.4
Tests towards Klebsiella pneumoniae	Neat PP	Trial 1	4.6 × 104	4.0 × 107
		Trial 2	1.1 × 105	2.8 × 107
		Average CFU	7.8 × 104	3.4 × 107
		Log(average CFU)	4.9	7.5
		Growth value F	2.6
	5 wt.% loaded	Trial 1	2.2 × 105	<20 *
		Trial 2	5.0 × 104	<20 *
		Average CFU	1.4 × 105	<20
		Log(average CFU)	5.1	<1.3
		Growth value G	<−3.8
	$A=F-G$		>6.4

* No colony detected, has to be written as <20 because the count is performed on 1 mL coming from a wash solution of 20 mL.