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Table 1 Presence and characteristics of Helicobacter pylori in gastric biopsies

From: Lack of association among TNF-α gene expression, -308 polymorphism (G > A) and virulence markers of Helicobacter pylori

Histolohy (N/%) Positive samples (n%) cagA+ (%) dupA+ (%) vacA (%)
  s1/m1 s2/m2 s1/m2
Control (40/100) 3 (7.5) 1 (2.5) 1 (2.5) 1 (2.5) 2 (5)
Chronic gastritis (70/100) 47 (67.1) 19* (27.1) 25 (35.7) 19* (27.1) 21 (30) 7 (10)
Gastric cancer (24/100) 21 (87.5) 20* (83.3) 15 (62.5) 21* (87.5)
Total (134) 71 40 41 41 23 7
  1. N: number of the total of samples; n: number of positive samples; *: statistical difference when p < 0.05