TABLE 3.

Patient demographics associated with pvl-positive MRSA and MSSA identified by the Irish National MRSA Reference Laboratory between 2002 and 2011

Patient characteristics	No. of isolates	Genotypea
Gender
Male	90	NA
Female	99	NA
Data not available	36	NA
Age group (yr)
0–9	35	NA
10–19	19	NA
20–29	40	NA
30–39	42	NA
40–49	23	NA
50–59	11	NA
60–69	9	NA
70–79	7	NA
80–89	4	NA
90–99	3	NA
Data not available	32	NA
No. of clustersb
1 (household)	4	CC/ST30-MRSA-IV
2 (household)	3	CC/ST30-MRSA-IV
3 (household)	4	CC/ST8-MRSA-IV
4 (household)	3	CC/ST8-MRSA-IV
5 (household)	4	CC80-MRSA-IV
6 (hospital)	6	ST772-MRSA-V
7 (hospital and household)c	11	ST772-MRSA-V
International travel to or country/region of origin
United States	1	CC1-MRSA-IV
	3	ST8-MRSA-IV
Africa	1	ST8-MRSA-IV
	1	CC5-MRSA-IV
	2	ST30-MRSA-IV
	1	CC121-MSSA
	1	CC5-MRSA-V
The Middle East	1	ST80-MRSA-IV
India	1	ST772-MRSA-V
	5	ST772-MRSA-V
Far East Asia	1	ST80-MRSA-IV
	1	ST154-MRSA-IV
	3	ST30-MRSA-IV
	1	CC121-MSSA
	1	ST59-MRSA-V
	1	ST8-MRSA-IV
Australia	1	CC22-MRSA-IV
	1	ST93-MRSA-IV
New Zealand	1	ST8-MRSA-IV
Brazil	1	ST8-MRSA-IV
Czech Republic	1	CC1-MRSA-IV
Undefined (outside of Ireland)	2	ST59/952-MRSA-V
	1	ST22-MRSA-IV
	1	CC22-MSSA
	1	CC30-MSSA

^aNA, not applicable; CC, clonal complex; ST, sequence type.

^bIsolates were defined as clusters if they were recovered from members of one family/household, within a hospital, or both. Within each cluster, isolates were recovered between 3 months and 2 years apart. Each isolate within a cluster was recovered from a different person or environmental source.

^cThe 11 pvl-positive ST772-MRSA-V isolates in cluster 7 were described previously (31).