ADA and idiopathic interstitial pneumonia: In a study conducted by Kubota et al. [10] mean ADA level in BAL fluid of miliary TB patients, sarcoidosis patients, idiopathic interstitial pneumonia patients, and control group was 5.02 ± 3.75 IU/L, 1.06 ± 0.99 IU/L, 0.21 ± 0.43 IU/L, and 0.3 ± 0.51 IU/L, respectively, and ADA level in BAL fluid of miliary TB patients was higher than that of other groups (P < 0.01).