[Infectious complications in immunosuppressed patients after kidney transplantation].

Under an immunosuppressive therapy after renal transplantation there is an increased risk of acquiring infections with a possible lethal outcome. On the basis of 4 cases it is shown that invasive diagnostic procedures are indicated when the primary noninvasive methods and therapeutical trials are unsuccessful. Early and consequent therapy of severe infections must imply the reduction or cessation of immunosuppression. Conservation of the transplant at any price is not justifiable.