A normal chest X-ray does not exclude tuberculosis, because Mycobacterium tuberculosis does not only invade the lungs, but also many organs, such as kidney tuberculosis and bone tuberculosis. Chest X-ray are normal, but also should be sputum examination, if the sputum culture found positive Mycobacterium tuberculosis or sputum smear antacid bacilli positive, can also be identified as Mycobacterium tuberculosis latent infected people, just the most common pulmonary tuberculosis. Currently, there are three types of pulmonary tuberculosis, as follows: first, latent Mycobacterium tuberculosis infections, which are positive sputum tests and no abnormal imaging data. Second, active tuberculosis, a condition in which sputum tests are positive and imaging data have typical lesions with typical symptoms such as fever, cough, weakness, and night sweats. Third, inactive tuberculosis, in which the sputum test is negative and the imaging data shows calcified foci, cordate lesions, or purified cavities or sclerotic nodules.