3. An induration of 15 or more millimeters is considered a positive reaction for people with no risk factors for TB. In most cases, people who have a very small reaction or no reaction probably do not have TB infection.
Skin test는 매우 유용하다.
하지만 skin test가 negative라고 해서 TB를 배제할 순 없고, 특히 TB 증상이 있다면 다른 검사들을 통해 확인해
DESIGN: The initial clinical and radiographic features of 229 PTB patients were compared with those of 70 patients with NTM lung disease. The most commonly involved organisms in the NTM lung disease cases were Mycobacterium avium complex (n 38, 54%) and M. abscessus (n 26, 37%).