Pulmonary Nocardia Asteroides Infection in a Renal Transplant Patient In a renal transplant patient, a pulmonary infiltration which was resistant to nonspesific antibiotic therapy occured after four acute rejection attacks treated with pulse steroids and antithymocyte globulin. Nocardia asteroides was isolated as the causative agent in this case. Based upon the antibiogram results, trimethoprim-sulfomethoxazole therapy was started and pulmonary infection recovered completely in the fourth month of this treatment. Renal transplantlı bir hastada steroidler ve anti-timosit globülinle tedavi edilen dört akut rejeksiyon atağından sonra nonspesifik antibiotik tedavisine dirençli bir akciğer infiltrasyonu gelişti. Etken patojen olarak Nocardia astreoides izole edildi. Antibiyogram sonucuna göre trimetoprim-sulfametoksazol tedavisine başlandı ve bu tedavinin dördüncü ayında pulmoner infeksiyon tamamen iyileşti