One thousand two hundred and eighty one clinically suspected untreated patients with pulmonary tuberculosis were studied from an urban tuberculosis clinic in Dhaka. Majority of the 1281 patients (77.6%) were from the age group of 14 to 44years. Sputum, 106(8.3%)werefound positivefor mycobacteria (both by Ziehl-Neels en smear staining and culture to consider those as confirmed cases of mycobacterial infection. Out of these 106 cases…