Wang Shengwei, Department of Emergency Medicine, Nanjing Chest Hospital: The diagnosis of bacillus-negative tuberculosis is very difficult, relying on medical history, clinical symptoms, chest films, serological tests, PPD skin tests, and exclusion of other common lung diseases, including the effectiveness of experimental anti-tuberculosis treatment, etc. For details, see the diagnostic guidelines for bacillus-negative tuberculosis, which are often difficult to give a definitive answer at once. If it is convenient, you can bring all the completed tests to the outpatient clinic, which can save some time. Wang Shengwei, Department of Emergency Medicine, Nanjing Chest Hospital