Table 1. Distribution of GBS invasive disease in infants by isolate source and age of infant at time of culture, Minnesota, USA, 2000–2010*.
| Culture source | No. infants with GBS invasive disease† |
Total | |||
|---|---|---|---|---|---|
| Early onset | Late onset |
||||
| 7–89 | 90–180 | >181 | |||
| Blood | 251 | 142 | 10 | 3 | 406 |
| Cerebrospinal fluid | 4 | 37 | 1 | 1 | 43 |
| Other sites‡ |
2 |
1 |
1 |
0 |
4 |
| All | 257 | 180 | 12 | 4 | 453 |
*GBS, group B Streptococcus. †No. isolates studied were 1 per infant (n = 453). Early-onset is birth–6 days. Late-onset categories (age in days at time of culture): classical (7–89); delayed (90–180); ultra (>181; not included in analyses). ‡Other sites, normally sterile: 1 bone, 1 joint, 2 tissues (1 liver, 1 lung).