H. pylori infection is contagious. 1. The source of H. pylori infection is usually the people who are infected by H. pylori. 2. The transmission route is generally the digestive tract, such as fecal-oral route, which is the direct or indirect contamination of the infected person’s feces with bacteria, and the infection occurs after other people consume it; oral-oral route, which is the contamination of tableware or food by the infected person’s saliva, and the infection occurs after other people come into contact with it; and there is also a less common way of transmission, which is the healthcare infection, which is the infection of infected person’s medical instruments used for examination that are not thoroughly disinfected, resulting in other patients being infected during examination. Another less common route of transmission is medical infection, which occurs when the infected person’s medical instruments are not thoroughly sterilized, resulting in other patients being infected during the examination. 3. If you are infected with H. pylori, it is recommended that other people in your family should also be tested for H. pylori. Positive patients should be actively treated and should share meals with their family members and not share utensils and cups of water, etc. If you are found to be infected with H. pylori, it is recommended that other people in your family should also be tested. If you are found to be infected by H. pylori, you should go to the hospital in time, under the guidance of a professional physician to avoid delaying the condition.