Table 1

Survival of H pylori (log cfu/ml (SD)) after exposure to acid (pH 2), urea (5 mmol/l), and potassium nitrite (1 mmol/l)

Nitrite absent Nitrite present
Control (pH 7)6.14 (0.98) (n=5)6.32 (1.62) (n=4)
0.2 M HCl/KCl (pH 2) plus urea (5 mmol/l)5.06 (0.91)1-165 (n=5)01-151 (n=5)
0.2 M HCl/KCl (pH 2) without urea 01-151 (n=5)01-151 (n=5)

  • ↵1-165 p<0.001 versus 0.2 M HCl/KCl (pH 2) plus urea with 1 mmol/l nitrite.

  • ↵1-151 No detectable survival.