Hello dear, thanks for your question on HCM. I can understand your situation and problem. Tuberculosis is spread by droplet infection from coughing or sneezing from infected persons. In my opinion you should consult pulmonologist and get done 1. CT thorax 2. Bronchoscopy and BAL (Bronchoalveolar lavage) analysis for tuberculosis. CT thorax gives much better idea about your fibrosis then chest x ray . Bronchoscopic evaluation is much more superior then simple sputum examination. So if both are normal then you can argue with visa authority about not having active,infectious disease. So consult pulmonologist and discuss all these.