The normal value of Helicobacter pylori is generally 0-100dPM, which can be detected by gastric mucosa biopsy and other programs, if the test result is within the normal range, it means that there is no infection of Helicobacter pylori. Helicobacter pylori is a kind of bacteria that requires harsh growth conditions, micro-anaerobic, spiral-shaped, and is mostly infected by improper diet, infection, and chronic gastric diseases. Infection can lead to peptic ulcer, chronic gastritis, gastric cancer and other diseases, and its normal value is usually 0 to 100dPM. The examination items of H. pylori include gastric mucosa biopsy, urea breath test, serologic examination, etc. The test results are usually affected by the testing method and instrument. Generally speaking, if the test result is within the normal range, it means that the body is not infected with H. pylori; a positive result means that the body has been or may be infected with H. pylori, and it is necessary to consult a doctor in time for antimicrobial treatment under the guidance of the doctor.