Tehran University of Medical Sciences Case Reports in Clinical Practice 2538-2683 2 4 2018 05 14 112 115 EN Maryam Mokhtaryan Department of Infectious Diseases, School of Medicine AND Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. Fereshteh Ghiasvand Department of Infectious Diseases, School of Medicine AND Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. Niloofar Ayoobi yazdi Department of Radiology, School of Medicine AND Advanced Diagnostic and Interventional Radiology Research Center, Tehran University of Medical Sciences, Tehran, Iran. 2017 12 06 2018 02 17 Nocardia infections rarely occur among normal population. Nocardiosis typically develops in immunocompromised person. In this paper, we report a case of pulmonary nocardiosis in an immunocompetent man. A 77-year-old man was examined in the emergency department because of cough, sputum, and fever from 10 days before admission. Computed tomography (CT) of the chest revealed air space consolidation, necrosis and cavities. Positive culture for nocardia species was reported. The patient received cotrimoxazole two regular-strength tablets (400/80 mg) "per os" (P.O) every 12 hours, and was discharged. In the follow-up after a month, he was completely well, most of his symptoms were improved, and his chest CT was near normal. https://crcp.tums.ac.ir/index.php/crcp/article/view/155 https://crcp.tums.ac.ir/index.php/crcp/article/download/155/93