[Urinary tract infections--causes, differential diagnosis and treatment].

Infections of the urinary tract occur quite frequently in patients of both sex in the practice as well as in the hospital. They are caused mainly by bacteria. However, virus- and significant fungus-infections of the kidney and the urinary tract are observed due to acquired immuno-suppression or induced by the physician. The current knowledge about this problem is still insufficient. Obtaining a careful history, the physical examination and biochemical analysis are still of great value for a successful treatment. Besides the drug therapy, the physiological immunological mechanisms should be activated by unspecific procedures. If they are the only risk factor, urinary tract infections including chronic courses never lead to kidney failure necessitating a dialysis.