A positive result for Mycobacterium tuberculosis DNA indicates that the patient is infected with Mycobacterium tuberculosis, which means that the patient has tuberculosis, and molecular biology tests can basically identify tuberculosis, which requires immediate medical attention. Tuberculosis is mainly an infection of Mycobacterium tuberculosis that attacks various parts of the body, including pulmonary tuberculosis, skin tuberculosis, bone tuberculosis, lymph node tuberculosis, and intestinal tuberculosis. Pulmonary TB is the most common and the most infectious, and it can spread through patient droplets and infect other people. Extrapulmonary TB is generally not contagious if it is not combined with other TB, but it has a huge impact on the physiological structure and function of the patient and requires active treatment. The treatment of tuberculosis should understand whether it is active tuberculosis, improve the relevant examination, then carry out chemotherapy for tuberculosis, adhere to the full amount, the whole process, the full course, early combination of treatment, as soon as possible to control the tuberculosis, in order to achieve maximum efficacy.