Survival of G. mellonella following infection by H. pylori strains. Kaplan-Meier survival curves of G. mellonella larvae after 24 h-96 h from injection with 1 × 104, 1 × 105, 1 × 106 and 1 × 107 CFUs of wild type strains G27 (panel A), 60190 (panel B), M5 (panel C) are shown. Kaplan-Meier survival curves of G. mellonella larvae after 24 h-96 h from injection with 1 × 106 CFUs of wild-type H. pylori strains G27, 60190 and M5 (panel D) are shown. The data shown are means ± SEM from three independent experiments recorded for 96 h. Differences in survival were calculated using the log-rank test for multiple comparisons. Differences were considered statistically significant at P < 0.05. PBS, phosphate-buffered saline.