How does H. pylori spread?
H. pylori, is believed to be transmitted orally by means of fecal matter through the ingestion of contaminated food or water. In addition, it is possible that H. pylori could be transmitted from the stomach to the mouth through gastro-esophageal reflux (in which a small amount of the stomach's contents is involuntarily forced up the esophagus) or belching, common symptoms of gastritis.