Table 4. Prevalence of molecular traits among methicillin-resistant Staphylococcus aureus (MRSA) isolates recovered from MRSA-colonized children, by study variable, 2004-2009.
| Children colonized | No. (% [95% CI]) of isolates | ||||
| Variable | with MRSA, no. | PVL present | SCCmec VT present | ST59 | ST338 |
| All participants | 371 | 123 (33.2 [28.4–37.9]) | 101 (27.2 [22.7–31.8]) | 320 (86.3 [82.8–89.8]) | 16 (4.3 [2.3–6.4]) |
| Source | |||||
| Health maintenance | |||||
| visitsa | 91 | 34 (37.4 [27.4–47.3]) | 29 (31.9 [22.3–41.4]) | 83 (91.2 [85.4–97.0]) | 5 (5.5 [0.8–10.2]) |
| Kindergartens | 280 | 89 (31.8 [26.3–37.2]) | 72 (25.7 [20.6–30.8]) | 237 (84.6 [80.4–88.9]) | 11 (3.9 [1.7–6.2]) |
| Sex | |||||
| Male | 198 | 65 (32.8 [26.3–39.4]) | 46 (23.2 [17.4–29.1]) | 169 (85.4 [80.4–90.3]) | 8 (4.0 [1.3–6.8]) |
| Femalea | 173 | 58 (33.5 [24.5–40.6]) | 55 (31.8 [24.9–38.7]) | 151 (87.3 [82.3–92.3]) | 8 (4.6 [1.5–7.8]) |
| Age, years | |||||
| <1a | 45 | 18 (40.0 [25.7–54.3]) | 13 (28.9 [15.7–42.1]) | 34 (75.6 [63.0–88.1]) | 2 (4.4 [0.0–10.5]) |
| 1–5 | 123 | 42 (34.1 [25.8–42.5]) | 35 (28.5 [20.5–36.4]) | 102 (82.9 [76.3–89.6]) | 5 (4.1 [0.6–7.6]) |
| >5 | 203 | 63 (31.0 [24.7–37.4]) | 53 (26.1 [20.1–32.2]) | 184 (90.6 [86.6–94.7]*) | 9 (4.4 [1.6–7.3]) |
| Survey | |||||
| 2004–2006a | 131 | 25 (19.1 [12.4–25.8]) | 14 (10.7 [5.4–16.0]) | 111 (84.7 [78.6–90.9]) | 1 (0.8 [0.0–2.3]) |
| 2007–2009 | 240 | 98 (40.8 [34.6–47.1]**) | 87 (36.3 [30.2–42.3]**) | 209 (87.1 [82.8–91.3]) | 15 (6.3 [3.2–9.3]*) |
CI, confidence interval; PVL, Panton-Valentine leukocidin; SCCmec, staphylococcal cassette chromosome mec; ST, sequence type.
a
Reference group.
*p<0.05,
**p<0.0001.