Tests for tuberculosis include blood tests, sputum mycobacterium tuberculosis tests, immunological tests, imaging tests and fiberoptic bronchoscopy. 1. Blood test: hemoglobin can be reduced in routine blood test, leukocytosis can be seen in the progressive stage, and rapid blood sedimentation can be seen in severe infection. 2. Sputum mycobacterium tuberculosis examination: (1) Sputum smear test: the sensitivity of this test is not high, and negative smear cannot exclude tuberculosis. (2) Culture method: the sensitivity is higher than that of smear method. (3) Drug sensitivity determination: it can provide the basis for the diagnosis of drug-resistant cases, the formulation of rational chemotherapy program and epidemiological monitoring. (4) Specific nucleic acid detection: PCR and DNA blot hybridization can measure the DNA of Mycobacterium tuberculosis. (3) Immunological test: Tuberculin test such as old tuberculin and pure protein derivatives of Mycobacterium tuberculosis, strong positivity in adults suggests the possibility of active tuberculosis. 4. Imaging tests : (1) Chest X-ray: It is used for routine diagnosis of tuberculosis, and can detect early and mild tuberculosis lesions, and can determine the nature of the lesion, whether it is active or not, and whether there is a cavity or not in a simple and intuitive way. (2) CT: It can clearly show the characteristics and nature of various types of tuberculosis lesions, and can also accurately show whether the mediastinal lymph nodes are enlarged or not. (5) Fiberoptic bronchoscopy: it can directly observe tracheal and bronchial lesions, and it can aspirate secretions and complete biopsy. There are many other possible tests for tuberculosis. If the test results indicate a high probability of tuberculosis, it is recommended to consult a doctor in time to avoid delaying treatment.