Volume 12, Number 8—August 2006
Dispatch
Community-acquired Methicillin-resistant Staphylococcus aureus in Children, Taiwan
Table 2
Distribution of staphylococcal cassette chromosome (SCC)mec types and exotoxin patterns among methicillin-resistant Staphylococcus aureus (MRSA) strains collected from community-acquired (CA) MRSA infections and nares cultures*
| CA-MRSA–colonizing strains |
CA-MRSA–infecting strains† | ||
|---|---|---|---|
| Characteristic | PVL positive (n = 15) | PVL negative (n = 74) | (n = 32) |
| SCCmec type, no. (%) of isolates | |||
| II | 0 | 1 (1.35) | 0 |
| III | 0 | 1 (1.35) | 0 |
| IIIA | 0 | 1 (1.35) | 0 |
| IV | 7 (46.7) | 70 (94.6)‡ | 5 (15.6) |
| VT§ | 8 (53.3) | 1 (1.35)‡ | 27 (84.4) |
| No. (%) of isolates positive for production of other toxins | |||
| ETA | 0 | 2 (2.7) | 0 |
| ETB | 1 (6.7) | 2 (2.7) | 0 |
| TSST-1 | 0 | 5 (6.6) | 1 (3.1) |
| SEA | 1 (6.7) | 6 (8.1) | 0 |
| SEB | 14 (93.3) | 57 (77.0)¶ | 32 (100) |
| SEC | 0 | 4 (5.4) | 0 |
| SED | 0 | 0 | 0 |
| SEE | 0 | 1 (1.4) | 0 |
| SEG/SEI | 0 | 30 (40.5)‡ | 0 |
| SEH | 0 | 1 (1.4) | 0 |
*PVL, Panton-Valentine leukocidin; ETA, exfoliative toxin A; ETB, exfoliative toxin B; TSST-1, toxic shock syndrome toxin-1; SEA, staphylococcal enterotoxin A; SEB, staphylococcal enterotoxin B; SEC, staphylococcal enterotoxin C; SED, staphylococcal enterotoxin D; SEE, staphylococcal enterotoxin E; SEG, staphylococcal enterotoxin G; SEI, staphylococcal enterotoxin I; SEH, staphylococcal enterotoxin H.
†All 32 CA-MRSA–infecting strains were PVL positive.
‡p<0.001 by χ2 test for PVL-positive MRSA-colonizing strains and CA-MRSA–infecting strains vs. PVL-negative MRSA-colonizing strains.
§VT refers to the SCCmec VT element in strain TSGH 17 from Taiwan (10).
¶p = 0.006 by χ2 test for PVL-positive MRSA-colonizing strains and CA-MRSA–infecting strains vs. PVL-negative MRSA-colonizing strains.
