My father developed severe productive cough in October 2010 and within next ten days ATT was started based on X Ray showing Right Pleural effusion , tests on the fluid in the right lung showed no AFB, however high ADA indicative of Tuberculosis was observed, high ESR ~ 68 , 3 consecutive sputem samples showed no positive AFB, after two months of ATT, X Ray shows no change and ESR is 84 which has actually increased, though cough is much reduced in intensity but still persists could you pl. suggest reason why even after 2 Months of ATT there is no change in X-Ray and ESR is still so high, Thank you so much