Table 1.
Distribution and statistical analysis of serological subtypes of GBS strains during the 5-year study period
| Molecular subtypes | ||||||||
|---|---|---|---|---|---|---|---|---|
| Total no. | Ia | Ib | II | III | IV | V | No. of NT | |
| 2015 | 550 | 95 (17.3%) | 10 (1.8%) | 6 (1.1%) | 120 (21.8%) | 1 (0.2%) | 124 (22.5%) | 194 (35.3%) |
| 2016 | 648 | 115 (17.7%) | 15 (2.3%) | 6 (1.0%) | 148 (22.8%) | 0 (0.0%) | 160 (24.7%) | 204 (31.5%) |
| 2017 | 700 | 120 (17.1%) | 7 (1.0%) | 10 (1.4%) | 235 (33.6%) | 0 (0.0%) | 320 (45.8%) | 8 (1.1%) |
| 2018 | 750 | 115 (15.3%) | 10 (1.3%) | 10 (1.3%) | 335 (44.7%) | 1 (0.1%) | 250 (33.3%) | 29 (4.0%) |
| 2019 | 846 | 103 (12.2%) | 5 (0.6%) | 8 (0.9%) | 380 (44.9%) | 0 (0.0%) | 215 (25.4%) | 135 (16.0%) |
| 5 years | 3494 | 548 (15.7%) | 47 (1.3%) | 40 (1.1%) | 1218 (34.9%) | 2 (0.1%) | 1069 (30.6%) | 570 (16.3%) |
| p Value | 2.12E–11 | 0.42 | 0.19 | 0.73 | 1.46E–44 | 0.56 | 6.78E–23 | |
| χ2 | 70.13 | 3.86 | 6.08 | 2.00 | 211.20 | 3.00 | 110.14 | |
NT not typable