Tabriz University of Medical Sciences Medical Journal of Tabriz University of Medical Sciences 2783-2031 40 5 2018 12 05 Isolation of Nocardia cyriacigeorgica from brain abscess 106 111 EN Sepehr Navid https://orcid.org/0000-0002-8039-7305 Mehdi Khorshidi Behnam Sisakhtpour Masoud Keikha https://orcid.org/0000-0003-1583-9936 Journal Article 2017 04 20 Background: Nocardia are filamentous, aerobic, gram positive and partially acid fast bacteria that lives in environmental sources such as: water, soil and dust. This bacteria are cause of respiratory, neurogical and cutaneous infection in both of immunocompromised and immuocompetent patients. Methods: A 20-year-old man with no history of a certain disease symptoms such as headache, weakness, drowsiness and urinary incontinence was referred to Al-Zahra hospital. Bacteria were isolated from the patient's brain abscess based on microscopic examination, culture, biochemical characteristics and molecular were identified as Nocardia cyriacigeorgica. And according to result of antibiogram, this patient was treated by prescription of cotrimoxazol, amikacin and linezolid. Conclusion: Nocardial brain abscess can be seen in both of immunocompromised and immuocompetent patients that if was not diagnosed and appropriate treatment was not prescribed could associate with high mortality.