The incubation period for tuberculosis infection with Mycobacterium tuberculosis varies because each person has a different constitution. Therefore, TB infection can usually be detected in about 1-3 months, and patients will have symptoms of TB poisoning, such as coughing, coughing up sputum, blood in sputum or even hemoptysis, which may be accompanied by weakness, night and afternoon night sweats, emaciation or even depression, and loss of appetite. A tuberculin test, X-ray or CT of both lungs can be done in about 1-3 months; if necessary, sputum from the respiratory tract can be taken to look for or culture Mycobacterium tuberculosis. If the result is negative, it means that the disease is not contagious and there is probably no Mycobacterium tuberculosis infection.