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ST distributions during three endemic stages
| Cluster | STs | Incidence stagea | ||
|---|---|---|---|---|
| High endemic 1950–1960s |
Decline 1970–1980s |
Re-emergence 1990–2010s |
||
| S1 | 7 | 0 | 1 | 4 |
| 8 | 17 | 20 | 100 | |
| 71 | 0 | 2 | 0 | |
| 72 | 0 | 0 | 1 | |
| 73 | 0 | 0 | 1 | |
| 74 | 0 | 0 | 10 | |
| 75 | 0 | 0 | 1 | |
| 81 | 0 | 1 | 0 | |
| S2 | 1 | 3 | 3 | 1 |
| 2 | 5 | 5 | 3 | |
| 5 | 3 | 1 | 0 | |
| 79 | 1 | 0 | 0 | |
| 82 | 0 | 1 | 0 | |
| S3 | 17 | 2 | 0 | 5 |
| 76 | 1 | 3 | 0 | |
| 77 | 0 | 5 | 0 | |
| 78 | 3 | 1 | 0 | |
| 80 | 1 | 0 | 0 | |
| 83 | 0 | 1 | 0 | |
a The number represents the amount of strains in a particular ST in each respective incidence stage
