TABLE 5.
S. mutans and S. sobrinus genotypic diversity in sampling sites from children's oral cavities and number of strains isolated in each site
| Sitea | No. of genotypes detected (%)b
|
No. of strains analyzed (%)c
|
||
|---|---|---|---|---|
| S. mutansd | S. sobrinuse | S. mutansf | S. sobrinusg | |
| S | 29 (55.77) | 6 (37.5) | 194 (25.09) | 11 (13.10) |
| T | 25 (48.07) | 8 (50) | 165 (21.34) | 17 (20.24) |
| G | 24 (46.15) | 5 (31.25) | 142 (18.37) | 6 (7.14) |
| D | 35 (67.30) | 10 (62.5) | 272 (35.19) | 50 (59.52) |
Abbreviations: S, saliva, T, dorsum of tongue; G, alveolar ridge mucosa; D, dental plaque.
In all, 52 distinct S. mutans gentoypes and 16 distinct S. sobrinus genotypes were detected in children's oral cavities.
The total number of S. mutans and S. sobrinus strains analyzed from children's oral cavities was 773 and 84, respectively.
Fisher's exact test showed a statistical difference among the numbers of S. mutans gentoypes from dental plaque and alveolar ridge mucosa (P = 0.0478). Comparison among genotypes from other sites (S [times] D, T [times] D, S [times] T, S [times] G, and T [times] G) did not show a significant statistical difference (P = 0.05).
Fisher's exact test did not show a statistical difference among the genotypes from each site (P = 0.005).
The chi-square test showed significant statistical difference among the numbers of strains isolated from dental plaque and the other three sites (D [times] S, D [times] T, and D [times] G) (P = 0.0000). Also, significant statistical difference occurs among the numbers of strains isolated from saliva and alveolar ridge mucosa (P = 0.0017). Comparison among the other sites (S [times] T and T [times] G) using the same statistical test did not show a significant statistical difference (P = 0.05).
The chi-square test showed significant statistical difference among the numbers of strains isolated from dental plaque and the other three sites (D × S, D × T, and D × G) (P = 0.0000). Also, significant statistical difference occurs among the numbers of strains isolated from saliva and alveolar ridge mucosa (P = 0.0017). Comparison among the other sites (S × T, S × G, and T × G) using the same statistical test did not show a significant statistical difference (P = 0.05).