Table 1 Number of group B streptococcal isolates (n = 529) screened via dot blot hybridization and characteristics of each collection*.
GBS Collection | Isolation source | Culture date | Age range | Race/ethnicity | Number of strains |
|---|---|---|---|---|---|
1a. Sexually active college women with UTI receiving care from a Student Health Services at the University of Michigan (UM) [22]. | urine, anal orifice, vaginal | Sept. 1996 to April 1999 | 18–30 | White (76%), Non-White (24%) | Colonizing (n = 102), Invasive†(n = 2) |
1b. Most recent male sex partner of women with UTI receiving care from the Student Health Services at UM [22]. | urine, anal orifice | Sept. 1996 to April 1999 | 18–35 | White (71%), Non-White (29%) | Colonizing (n = 43), Invasive†(n = 0) |
2a. Sexually active college women without UTI presenting to the Student Health Services at UM [22]. | urine, anal orifice, vaginal | Sept. 1996 to April 1999 | 18–28 | White (80%), Non-White (20%) | Colonizing (n = 57), Invasive†(n = 0) |
2b. Most recent male sex partner of women without UTI presenting to the Student Health Services at UM [22]. | urine, anal orifice | Sept. 1996 to April 1999 | 19–33 | White (73%), Non-White (27%) | Colonizing (n = 35), Invasive†(n = 0) |
3. Newborns with early onset disease from hospitals affiliated with Baylor College of Medicine [19]. | blood, CSF | 1993 to 2000 | < 7 days | Hispanic (56%), African American (24%), Caucasian (16%), Asian (4%) | Colonizing (n = 0), Invasive†(n = 100) |
4a. Random sample of college aged women from the UM community [21] | urine, anal orifice, vaginal | Sept. to Nov. 1998 | 17–49 | Caucasian (65%), Asian (16%), African American (10%), Hispanic (5%), Other (5%) | Colonizing (n = 29), Invasive†(n = 1) |
4b. Random sample of college aged men from the UM community [21] | urine, anal orifice | Sept. to Nov. 1998 | 19–45 | Caucasian (60%), Asian (28%), African American (4%), Hispanic (3%), Other (4%) | Colonizing (n = 23), Invasive†(n = 1) |
5. Pregnant women presenting at the UM Medical Center for prenatal care [34]. | urine, rectal, vaginal, placental | Aug. 1999 to Mar. 2000 | 16–42 | Caucasian (67%), African American (18%), Other (7%), Unknown (9%) | Colonizing (n = 49), Invasive†(n = 53), Unknown (n = 29) |