Table 2.
Serotype distributions and antibiotic resistance of 681 GBS isolates from maternal colonization, neonatal and adult invasive diseases.
| No. (%) of Resistant GBS Isolates | ||||||||
|---|---|---|---|---|---|---|---|---|
| Sources | Maternal Colonized Strains (Total n = 100) | Adult Invasive Strains (Total n = 399) | Neonatal Invasive Strains (Total n = 182) | Total (n = 681 GBS Isolates) | ||||
| Serotype(n)/ Antibiotics |
Erythromycin | Clindamycin | Erythromycin | Clindamycin | Erythromycin | Clindamycin | Erythromycin | Clindamycin |
| Ia (n = 80) | 1/7 (14.3) | 1/7 (14.3) | 10/40 (25.0) | 7/40 (17.5) | 8/33 (24.2) | 10/33 (30.3) | 19/80 (23.8) | 18/80 (22.5) |
| Ib (n = 81) | 8/10 (80.0) | 8/10 (80.0) | 50/56 (89.3) | 50/56 (89.3) | 15/15 (100.0) | 15/15 (100.0) | 73/81 (90.1) | 73/81 (90.1) |
| II (n = 47) | 1/6 (16.7) | 1/6 (16.7) | 5/38 (13.2) | 5/38 (13.2) | 0/3 (0) | 0/3 (0) | 6/47 (12.8) | 6/47 (12.8) |
| III (n = 190) | 16/25 (64.0) | 15/25 (60.0) | 25/47 (53.2) | 29/47 (61.7) | 97/118 (82.2) | 91/18 (77.1) | 138/190 (72.6) | 135/190 (71.1) |
| V (n = 81) | 11/16 (68.8) | 11/16 (68.8) | 40/59 (67.8) | 39/59 (66.1) | 4/6 (66.7) | 4/6 (66.7) | 55/81 (67.9) | 54/81 (66.7) |
| VI (n = 192) | 6/35 (17.1) | 6/35 (17.1) | 40/150 (26.7) | 40/150 (26.7) | 0/7 (0) | 0/7 (0) | 46/192 (24.0) | 46/192 (24.0) |
| Others (10) | 0/1 (0) | 0/1 (0) | 0/9 (0) | 1/9 (11.1) | 0/0 (0) | 0/0 (0) | 0/10 (0) | 1/10 (10.0) |
| All (n = 681) | 43/100 (43.0) | 42/100 (42.0) | 170/399 (42.6) | 171/399 (42.9) | 124/182 (68.1) | 120/182 (65.9) | 337/681 (49.5) | 333/681 (48.9) |
All 681 GBS isolates are susceptible to vancomycin, ampicillin, penicillin, cefotaxime, and teicoplanin. All data are expressed as resistant strains/total strains (percentage).