The good quality sputum specimens following Bartlett criteria ≥ +1, ≥ +2, ≥ +3 are 263 (68.13%), 174 (45.08%), 70 (18.13%) respectively. The good quality sputum specimens following criteria of squamous epithelial cells < 10 and criteria of squamous epithelial cells < 10 and leukocytes > 25 are 258 (66.84%), 151 (39.12%) respectively.