The main ways of transmission of Helicobacter pylori include oral-oral transmission, fecal-oral transmission and so on. 1. Oral-oral transmission: H. pylori can be transmitted through the saliva of an infected person. Sharing personal items such as toothbrushes with an infected person, eating together, mouth-to-mouth feeding, kissing, and eating without washing hands after contacting infected saliva may all lead to infection. 2. Fecal-oral transmission: Helicobacter pylori can exist in the feces of infected people, and if you do not wash your hands after contacting the feces of an infected person, it may lead to disease. Therefore, it is important to wash your hands before and after meals, practice meal portioning, and not share personal items such as toothbrushes, cups, and chopsticks with others. If Helicobacter pylori infection develops seriously, it may lead to chronic gastritis, peptic ulcer or gastric cancer. Patients should consult a doctor in time and seek treatment as soon as possible, which can usually be cured and has a better prognosis.