What does tuberculosis skin test negative and positive represent

Tuberculosis tuberculin test, also known as PPD test, its negative and positive must be analyzed according to individual specific circumstances, and can not be said that it can be used as a major basis for the diagnosis of tuberculosis, it is only a reference basis. First, tuberculosis skin test negative, it includes never infected with Mycobacterium tuberculosis, or some cases infected with tuberculosis, suffering from tuberculosis, but because of poor resistance, the body does not show tuberculosis antibody, he can be negative when the skin test. Second, tuberculosis skin test positive, this situation often indicates the existence of infection with Mycobacterium tuberculosis, or BCG vaccination, but he may be currently suffering from tuberculosis, may not currently suffer from tuberculosis, so according to symptoms and other imaging tests and sputum tests to comprehensively analyze its clinical significance. If the diagnosis is tuberculosis, must actively accept treatment, regardless of its skin test is negative or positive.