Tuberculosis is a respiratory infectious disease caused by infection with Mycobacterium tuberculosis. 3. Chest X-ray, costing from $30 to $150, is one of the most important tests for TB screening and has a high positive rate. 4. Lung CT, costing from $150 to $300, has a higher accuracy and positivity rate than chest X-ray and is therefore more expensive. 5. The specificity and sensitivity are relatively high, but it is not generally preferred. Therefore, the cost of TB physical examination ranges from 50-1500 yuan, with some variation depending on the items done and regional pricing.