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학습 자료 둘러보기 →The most specific indicator of active, infectious TB is a productive cough lasting 3 weeks or longer, especially with hemoptysis. This suggests cavitary disease with a high bacillary load.
A positive TST or IGRA alone confirms infection but not active disease. Calcified granulomas on X-ray indicate prior, healed infection. Systemic symptoms like night sweats and weight loss are suggestive but less specific than hemoptysis.
Immediately place any patient with suspected active pulmonary TB in a negative pressure airborne infection isolation room and use N95 respirators. Do not wait for sputum smear results to initiate precautions.
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