TABLE 2.
Distribution of Community-Associated (CA) versus Healthcare-Associated(HA) Methicillin-Resistant Staphylococcus aureus(MRSA) Strain Types from 30 Hospitals, by Isolate Collection Date
| Variable | No. (%) of community- onset infection isolates |
No. (%) of hospital- onset infection isolates |
||
|---|---|---|---|---|
| All sources | Blood only | All sources | Blood only | |
| CA-MRSA | ||||
| t008 spa type | 751 (51) | 62 (39) | 282 (37) | 19 (37) |
| Other CA-MRSA spa typesa | 114 (8) | 20 (12) | 47 (6) | 4 (8) |
| All CA-MRSA spa types | 865 (58) | 82 (51) | 329 (43) | 23 (44) |
| HA-MRSA | ||||
| t002 spa types | 192 (13) | 22 (14) | 155 (20) | 8 (15) |
| t242 spa types | 293 (20) | 36 (22) | 185 (24) | 11 (21) |
| Other HA-MRSA spa types | 83 (6) | 12 (7) | 71 (9) | 7 (13) |
| All HA-MRSA spa types | 568 (38) | 70 (44) | 411 (54) | 26 (50) |
| Other strainsb | 39 (4) | 7 (5) | 19 (3) | 3 (6) |
NOTE. Community-onset infection isolates were defined as those isolated on or before the second day of hospitalization, and hospital-onset infection isolates were defined as those isolated after the second day of hospitalization.
a
For CA-MRSA, other spa types were also multilocus sequence type ST8; for HA-MRSA,these other spa types were also multilocus sequence type ST5.
b
These strains were not related to ST5 or ST8.