The relationship between diabetes mellitus (DM) and pulmonary tuberculosis has attracted the interest of many clinicians and investigators for a long time. Many studies have shown that the prevalence of tuberculosis among diabetics is 2–5 times higher than in the nondiabetic population A group of diseases that result in too much sugar in the blood (high blood glucose). Diabetes is a chronic disease that occurs when the pancreas is no longer. able to make insulin or when the body cannot make good use of the insulin it produces. Diabetes risk factors. Diabetes prevention. Diabetes symptoms. Types: Type 1 diabetes, Type 2 diabetes Diabetes is a chronic condition associated with abnormally high levels of sugar (glucose) in the blood. Insulin produced by the pancreas lowers blood glucose. Absence or insufficient production of insulin, or an inability of the body to properly use insulin causes diabetes.