Table 3.
Sequence type distributions during the three incidence stages
| ST |
Incidence stagea |
Total | ||
|---|---|---|---|---|
| 1950-1960s | 1970-1980s | 1990-2000s | ||
| 1 |
|
2 (9.52%) |
1 (4.76%) |
3 (5.00%) |
| 2 |
2 (11.11%) |
6 (28.57%) |
2 (9.52%) |
10 (16.67%) |
| 5 |
1 (5.56%) |
|
|
1 (1.67%) |
| 8 |
11 (61.11%) |
3 (14.29%) |
10 (47.62%) |
24 (40.00%) |
| 17 |
1 (5.56%) |
|
|
1 (1.67%) |
| 28 |
|
1 (4.76%) |
|
1 (1.67%) |
| 29 |
|
4 (19.05%) |
1 (4.76%) |
5 (8.33%) |
| 30 |
|
1 (4.76%) |
|
1 (1.67%) |
| 31 |
|
1 (4.76%) |
|
1 (1.67%) |
| 32 |
|
1 (4.76%) |
|
1 (1.67%) |
| 33 |
|
1 (4.76%) |
|
1 (1.67%) |
| 34 |
2 (11.11%) |
1 (4.76%) |
6 (28.57%) |
9 (15.00%) |
| 35 |
|
|
1 (4.76%) |
1 (1.67%) |
| 36 | 1 (5.56%) | 1 (1.67%) | ||
aThe number represent strain number. The percentage in brackets represents the percentage of the strains in the time period.