A low concentration of Mycobacterium tuberculosis generally means a low positivity for Mycobacterium tuberculosis. Even though the test result is extremely low, it is still positive, indicating the presence of disease caused by Mycobacterium tuberculosis infection, which generally means tuberculosis. Mycobacterium tuberculosis infection tends to cause chronic respiratory disease. In the early stage of infection or after treatment, the number of Mycobacterium tuberculosis bacteria in the body may be relatively low, so a positive test result for Mycobacterium tuberculosis will be extremely low, and treatment should be continued to avoid worsening the condition with continuous growth and reproduction of the bacteria. Patients with Mycobacterium tuberculosis infection mostly show cough, sputum, chest pain and fatigue, etc. Generally, when patients have unexplained fever and persistent cough without improvement, it is considered to be a precursor of tuberculosis, and it is recommended to go to the hospital for consultation. Patients can be treated conservatively with drugs such as rifampicin and isoniazid according to medical advice. The commonly used treatment program is divided into two phases, intensive and consolidation, which are different types of drugs, and most of them require a treatment course of 6 to 9 months. Specific treatment should also follow medical advice. When Mycobacterium tuberculosis infection occurs, even if the concentration is low, early treatment is needed to prevent the condition from worsening and infecting other healthy organs. Mycobacterium tuberculosis is highly contagious, so if you need to go out, try to wear a mask and stay out of crowded places.