TABLE 2.

Staphylococcus aureus colonization by body site among subjects with and without a closed skin infection

Colonization	S. aureus colonization										MRSA colonization										MRSA colonization
	Case subjects								Control subjects (n = 147)		Case subjects								Control subjects (n = 147)		Case subjects								Control subjects (n = 147)
	All (n = 147)		MRSA-positive infection (n = 49)		MSSA-positive infection (n = 36)		S. aureus-negative infection (n = 62)				All (n = 147)		MRSA-positive infection (n = 49)		MSSA-positive infection (n = 36)		S. aureus-negative infection (n = 62)				All (n = 147)		MRSA-positive infection (n = 49)		MSSA-positive infection (n = 36)		S. aureus-negative infection (n = 62)
	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%	No.	%
Colonized at any sitea	119	81.0	47	95.9	32	88.9	40	64.5	96	65.3	59	40.1	46	93.9	3	8.3	10	16.1	27	18.4	76	51.7	14	28.6	31	86.1	31	50.0	77	52.4
By site
Nose	78	53.1	38	77.6	24	66.7	16	25.8	57	38.8	37	25.2	33	67.3	1	2.8	3	4.8	14	9.5	41	27.9	5	10.2	23	63.9	13	21.0	43	29.3
Groin	75	51.0	38	77.6	23	63.9	14	22.6	35	23.8	42	28.6	37	75.5	2	5.6	3	4.8	8	5.4	33	22.4	1	2.0	21	58.3	11	17.7	27	18.4
Rectum	63	42.9	33	67.3	20	55.6	10	16.1	34	23.1	36	24.5	31	63.3	2	5.6	3	4.8	11	7.5	28	19.0	2	4.1	19	52.8	7	11.3	24	16.3
Throat	85	57.8	32	65.3	23	63.9	30	48.4	79	53.7	32	21.8	24	49.0	1	2.8	7	11.3	13	8.8	54	36.7	9	18.4	22	61.1	23	37.1	67	45.6
No. of sites
4	27	18.4	18	36.7	7	19.4	2	3.2	14	9.5	13	8.8	13	26.5	0	0.0	0	0.0	0	0.0	8	5.4	0	0.0	6	16.7	2	3.2	11	7.5
3	32	21.8	13	26.5	13	36.1	6	9.7	20	13.6	16	10.9	13	26.5	1	2.8	2	3.23	7	4.8	16	10.9	0	0.0	12	33.3	4	6.5	14	9.5
2	37	25.2	14	28.6	11	30.6	12	19.4	27	18.4	17	11.6	14	28.6	1	2.8	2	3.23	5	3.4	24	16.3	3	6.1	12	33.3	9	14.5	23	15.6
1	23	15.6	2	4.1	1	2.8	20	32.3	35	23.8	13	8.8	6	12.2	1	2.8	6	9.68	15	10.2	28	19.0	11	22.4	1	2.8	16	25.8	29	19.7

^aTwenty-six patients had both MRSA and MSSA colonization.