Aim assess whether a H. pylori infection could affect growth in early life investigate the interplay between H. pylori and normal gut microbiota during early stages of life understand the influences of H pylori and normal gut microbiota on the development of metabolic and immune systems by assessing the metabolic hormones and cytokinesAim • assess whether a H. pylori infection could affect growth in early life • investigate the interplay between H. pylori and normal gut microbiota during early stages of life • understand the influences of H. pylori and normal gut microbiota on the development of metabolic and immune systems by assessing the metabolic hormones and cytokines