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The effect of glycemic control on clinico-radiological manifestations of pulmonary tuberculosis in patients with diabetes mellitus

Background: The association between diabetes mellitus (DM) and tuberculosis (TB) and their synergistic role in causing human disease has been recognized for centuries. Despite the known synergy between DM and TB, the importance of atypical clinical, radiological presentation and DM as a risk factor for TB is largely unknown. This study was undertaken to know the effect of glycemic control on TB manifestations as it will contribute to the opportunities for detection and treatment of both disease conditions appropriately. Methods: This cross-sectional study included 50 patients attending the pulmonary medicine department in Ispat General Hospital with pulmonary TB and DM during 6 months' period. Clinical data, chest-X ray, HbA1c values were obtained and the effect of glycemic control studied and analyzed. Results: Five patients had good glycemic control (HbA1c ≤7%), 45 patients had poor glycemic control (HbA1c >7%). Cough was present in all patients. Weight loss and night sweats were present in poor glycemic group and sputum smear grade was higher in higher HbA1c patients and both were statistically significant. None of the good glycemic group had lower zone lesion. The commonest type of lesion was nonhomogenous opacity, followed by cavities in both poor and good glycemic groups. Cavities were usually present in lower zones. Size and number of cavities were more as the glycemic control is poor. So, that glycemic control did have an effect on pulmonary TB manifestations, hence achieving and maintaining glycemic control is necessary for DM with pulmonary TB.