cagA gene and vacA polymorphism in patients with benign gastroduodenal diseases or gastric adenocarcinoma. All patients had positive results for ureA gene
| Diagnosis | No of patients | Per cent cagA positive | vacA alleles (% positive) | |||
|---|---|---|---|---|---|---|
| s1 | s2 | m1 | m2 | |||
| Benign diseases | ||||||
| Antral gastritis | 25 | 60*** | 60** | 40** | 321-150 | 681-150 |
| Gastric ulcer | 9 | 100 | 100 | 0 | 89 | 11 |
| Duodenal ulcer | 29 | 90 | 83 | 17 | 55 | 45 |
| Duodenitis | 8 | 100 | 88 | 12 | 63 | 37 |
| Malignant disease | ||||||
| Gastric adenocarcinoma | 17 | 94 | 100 | 0 | 59 | 41 |
↵1-150 χ2 =9.66, p<0.05; ** χ2 =13.97, p<0.01; *** χ2 =16.01, p<0.001.