Gastroscopy in regular hospitals generally do not occur cross-infection, but not absolutely, improper operation or a certain chance of infection. In regular hospitals, gastroscopy will be in a relatively sterile gastroscopy room, in gastroscopy, physicians will strictly abide by the relevant rules and regulations, strictly wearing a cap, mask, wear a good surgical clothing, the entire use of tools are sterilized. When the patient has finished the gastroscopy, all the items will be sterilized again. In the process of gastroscopy, the instruments are sterilized, so gastroscopy generally does not appear cross-infection. However, if the gastroscope and other instruments are not strictly sterilized, there is still a chance of cross-infection. In order to minimize the chance of cross-infection, patients are advised to go to regular hospitals for examination.