If there are symptoms such as prolonged low-grade fever, night sweats, cough and sputum, TB is highly suspected, and further tests can be performed at the hospital to clarify the diagnosis. Routine blood sedimentation test can be performed. Tuberculosis can have anemia and increased blood sedimentation. If the tuberculosis antibody is positive and the tuberculin test is strongly positive, active tuberculosis is indicated. A gamma interferon release test, or T-SPOT test, may also be performed, and if positive, active TB is also highly suspected. In addition, further X-rays or CT of the lungs should be performed, and if there are changes such as tuberculous cavities, tuberculous nodules or cornea, tuberculosis is highly suspected. Further sputum smear for Mycobacterium antacidum or Mycobacterium tuberculosis will be performed, and if positive, a definite diagnosis of tuberculosis will be made.