TABLE 3.
The frequency of genes encoding the surface adhesins (hvgA and rib) and pilus islands (PI-1, PI-2a, PI-2b) among 270 various group B streptococcus (GBS) serotypes from Mayanei Hayeshua Medical Center (MHMC) and Meuhedet Health Maintenance Organization (MHMO).
| Serotypes | N0 of strains | Genes | |||||||||
| PI-2b | PI-2a | PI-1 | rib | hvgA | |||||||
| N 0 | % | N 0 | % | N 0 | % | N 0 | % | N 0 | % | ||
| Ia | 13 | 3 | 23.1 | 12 | 92.3 | 10 | 76.0 | 0 | 0 | 1 | 7.7 |
| Ib | 6 | 1 | 16.7 | 5 | 83.3 | 6 | 100 | 1 | 16.7 | 0 | 0 |
| II | 12 | 1 | 8.3 | 12 | 100 | 11 | 91.7 | 3 | 25 | 0 | 0 |
| III | 96 | 62 | 64.6* | 76 | 79.2 | 82 | 85.4 | 81 | 84.4* | 55 | 57.3* |
| IV | 28 | 4 | 14.3 | 26 | 92.9 | 26 | 92.9 | 3 | 10.7 | 0 | 0 |
| V | 26 | 2 | 7.7 | 21 | 80.8 | 24 | 92.3 | 2 | 7.7 | 1 | 3.8 |
| VI | 88 | 6 | 6.8 | 77 | 87.5 | 83 | 94.3 | 15 | 17 | 5 | 5.7 |
| VII | 1 | 0 | 0 | 1 | 100 | 1 | 100 | 0 | 0 | 0 | 0 |
| VIII | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| IX | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 270 | 79 | 29.3 | 230 | 85.2 | 243 | 90 | 105 | 38.9 | 62 | 23 |
*Chi square p-value < 0.05. Distribution of genes encoding the surface adhesins (hvgA and rib) and pilus islands (PI-1, PI-2a, PI-2b) among 270 various GBS serotypes. PI-2b, hvgA, and rib genes were mainly detected in serotype III GBS isolates (64.6, 57.3, and 84.4%, respectively). There was a significant association between hvgA, rib, and PI-2b genes with serotype III (p < 0.05). Statistical significant values were highlighted in bold.