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The most common vacA genotypes involved in progressing to peptic ulcer
| Most common genotypes associated with peptic ulcer disease | Iran | Europe | Southeast Asia | Middle East |
|---|---|---|---|---|
| s1 | + | + | + | + |
| s2 | – | – | – | – |
| m1 | + | + | + | + |
| m2 | – | – | – | – |
| s1m1 | – | – | – | – |
| s1m2 | + | – | – | – |
| s2m1 | – | – | – | – |
| s2m2 | – | – | – | – |
| i1 | – | – | + | – |
