10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 3 2011 (July - September) In the first half of the last century tuberculosis was the main focus of attention amongst all respiratory diseases. Bronchial asthma is a serious global health problem. The present study was carried out to estimate magnesium levels in serum in pulmonary tuberculosis and bronchial asthma cases and to compare them with the serum magnesium levels of controls. This study was undertaken in 120 subjects, 40 diagnostic cases of pulmonary tuberculosis (group I), 40 diagnostic cases of bronchial asthma (group II), and 40 normal control groups (group III). Magnesium levels were analyzed from serum by spectrophotometer, using calmagite method. Our study shows a significant decrease ( Biswajit Das, Prasanna Chandra And K.V. Thimmaraju Magnesium, Pulmonary Tuberculosis, Bronchial asthma, Hypomagnesemia 423-429