Table 5.
Annual Incidence of Group B Streptococcus (GBS) Infection in Select Populations, Including and Excluding Noninvasive Polymicrobial GBS Infections by Age Groupa
| Characteristic | All Most Serious GBS Infections (Excluding Noninvasive Polymicrobial Infections), No. per 100 000 | ||
|---|---|---|---|
| Patients Aged 18–64 y | Patients Aged ≥65 y | Patients Aged ≥18 y | |
| All | 68 (43) | 100 (72) | 73 (48) |
| Black adultsa | 152 (92) | 199 (119) | 157 (95) |
| White adultsa | 54 (35) | 89 (67) | 60 (40) |
| Chronic renal disease | 401 (238) | 473 (375) | 421 (276) |
| Diabetes | 486 (280) | 240 (156) | 409 (241) |
| Coronary artery disease | 279 (149) | 236 (168) | 259 (158) |
| Stroke | 165 (74) | 181 (114) | 171 (90) |
| Obesityb | 117 (74) | 232 (171) | 129 (83) |
| Class 1 | 77 (48) | 161 (127) | 87 (57) |
| Class 2 | 111 (71) | 308 (216) | 126 (82) |
| Class 3 | 247 (153) | 476 (325) | 263 (165) |
| COPD | 86 (53) | 129 (98) | 98 (65) |
| Current smokers | 98 (63) | 100 (81) | 98 (64) |
Abbreviations: COPD, chronic obstructive pulmonary disease; GBS, group B Streptococcus.
aIf GBS was isolated from >1 clinical site in the same patient, the most life-threatening or deepest site of infection was considered the most serious infected site. Rates were presented for all GBS infections and, in parentheses, excluding noninvasive polymicrobial infections (where the role of GBS as the primary cause of infection may not be clear).
bRace was missing for 3 patients.
cObesity was defined as body mass index (BMI; calculated as weight in kilograms divided by height in meters squared) ≥30.0, class 1 obesity as BMI 30.0–34.9, class 2 obesity as BMI 35.0–39.9, and class 3 obesity as BMI ≥40.0. BMI was missing for 8 patients.