Table 1.

In vitro activity of MRS broth, LB-SCS, GG-SCS, and lactic acid against H. pylori a

Treatment Viable H. pylori (log CFU/ml)
Control7.45 ± 0.25
MRS broth6.94 ± 0.34
LB-SCS1.98 ± 0.41c
LB-SCS (heated)b 2.96 ± 0.44c
GG-SCS3.96 ± 0.73c
GG-SCS (heated)b 5.81 ± 0.41
l-Lactic acid (100 mM)7.75 ± 0.05
dl-Lactic acid (100 mM)7.52 ± 0.08
  • a The pH was adjusted to 4.5 with HCl for all experiments.

  • b Heated at 100°C for 1 h.

  • c Statistical analysis performed with a Student t test between control and treated H. pylori showed a highly significant difference (P < 0.01).