Table II

Summary Statistics by Method, Operator, and Microorganism (n = 6)

Method	Operator	Average (CFU)
Method	Operator	B. subtilis	S. aureus	A. brasiliensis	P. aeruginosa	C. albicans	E. coli
GD	1	53.8	55.3	53.8	34.3	48.3	46.7
GD	2	59.0	49.8	55.3	37.8	48.0	49.5
GD	3	58.0	61.7	76.7	37.2	52.3	53.7
GD	4	60.8	57.7	52.2	37.5	49.0	47.2
PC	1	48.8	50.7	54.2	39.6	43.7	51.4
PC	2	56.6	43.1	58.7	39.0	46.3	47.5
PC	3	59.3	57.7	55.0	43.8	52.7	51.5
PC	4	53.9	61.6	63.9	32.1	57.4	46.2

Method	Operator	Standard Deviation (CFU)
Method	Operator	B. subtilis	S. aureus	A. brasiliensis	P. aeruginosa	C. albicans	E. coli
GD	1	8.3	5.5	3.1	3.7	8.0	9.8
GD	2	7.4	7.4	8.4	4.7	7.5	5.1
GD	3	6.7	6.2	9.4	5.7	6.7	7.2
GD	4	7.2	9.3	7.0	6.4	6.5	8.4
PC	1	9.2	5.8	8.2	7.4	9.8	3.4
PC	2	8.5	4.7	11.8	10.6	6.4	4.7
PC	3	8.7	8.1	4.5	3.2	5.1	7.9
PC	4	8.6	13.4	8.1	6.2	9.8	6.5

Method	Operator	Coefficient of Variation (%)
Method	Operator	B. subtilis	S. aureus	A. brasiliensis	P. aeruginosa	C. albicans	E. coli
GD	1	15	10	6	11	17	21
GD	2	13	15	15	12	16	10
GD	3	11	10	12	15	13	13
GD	4	12	16	13	17	13	18
PC	1	19	11	15	19	23	7
PC	2	15	11	20	27	14	10
PC	3	15	14	8	7	10	15
PC	4	16	22	13	19	17	14