H. pylori can be infectious through food, common utensils, and intimate contact. H. pylori can be present in food, and a daily diet that does not take care to clean food, does not cook meat, and drinks contaminated water can lead to the presence of H. pylori in food and into the digestive system. H. pylori is contagious and can be transmitted to others through the sharing of dishes and utensils. There is a portion of H. pylori in the human mouth, and when there is intimate contact, such as kissing or mouth-to-mouth feeding, it can lead to the transmission of some of the H. pylori to others.