Table 2.

Average colony count (colony-forming units), SD, percentage reduction, and p-value between treatment and control groups for each energy dose.

Bacteria species	Control group (mean ± SD) (n = 4)	Treatment group (Mean ± SD) (n = 4)	% Reduction	p-value
S. aureus (ATCC 25923)
28 J/cm2	147.0 ± 8.9	122.0 ± 24.0	−17.0	0.085
56 J/cm2	113.5 ± 27.2	127.0 ± 35.9	+11.8	0.574
112 J/cm2	111.8 ± 24.5	123.5 ± 19.8	+10.1	0.632
E. coli (ATCC 25922)
28 J/cm2	110.8 ± 4.4	99.8 ± 16.9	−9.9	0.263
56 J/cm2	109.3 ± 12.3	121.0 ± 23.8	+10.8	0.458
112 J/cm2	142.8 ± 10.6	76.5 ± 47.8	−46.4	0.045
P. aeruginosa (ATCC 27853)
28 J/cm2	80.0 ± 14.4	51.0 ± 14.7	−36.3	0.010
56 J/cm2	120.3 ± 24.2	47.5 ± 19.8	−60.5	0.018
112 J/cm2	136.5 ± 31.8	23.5 ± 32.9	−82.8	0.000
A. baumannii
28 J/cm2	87.2 ± 20.5	90.3 ± 17.0	+3.4	0.366
56 J/cm2	86.5 ± 13.9	100.3 ± 11.1	+15.9	0.258
112 J/cm2	83.8 ± 9.8	82.5 ± 4.00	−1.5	0.817
P. aeruginosa
28 J/cm2	121.5 ± 28.8	116.5 ± 50.6	−4.1	0.758
56 J/cm2	106.8 ± 9.2	84.3 ± 18.6	−21.1	0.026
112 J/cm2	108.3 ± 42.0	23.0 ± 13.22	−78.8	0.011
S. haemolyticus
28 J/cm2	56.5 ± 7.2	57.5 ± 14.2	+2.2	0.900
56 J/cm2	36.5 ± 13.6	34.5 ± 23.1	−5.5	0.780
112 J/cm2	54.5 ± 12.4	64.3 ± 18.7	+18.3	0.199
E. coli
28 J/cm2	131.0 ± 19.4	143.8 ± 24.0	+9.7	0.492
56 J/cm2	129.0 ± 16.5	135.0 ± 14.5	+4.7	0.475
112 J/cm2	131.5 ± 25.0	130.8 ± 29.4	−0.6	0.974
E. faecalis
28 J/cm2	125.8 ± 19.5	102.5 ± 36.6	−18.5	0.218
56 J/cm2	119.3 ± 30.3	111.0 ± 33.7	−6.9	0.734
112 J/cm2	116.8 ± 29.7	121.5 ± 33.3	+4.1	0.790

S. aureus=Staphylococcus aureus, E. coli=Escherichia coli, P. aeruginosa=Pseudomonas aeruginosa, A. baumannii=Acinetobacter baumannii, S. haemolyticus=Staphylococcus haemolyticus, E. faecalis=Enterococcus faecalis, SD=Standard deviation, ATCC=American Type Culture Collection