All patients presenting to our center with positive cultures for Myobacterium simiae from any specimem will be included in the study.
Non-probability sampling: only in-hospital patients are collected.
-Age > 18 years
- Any positive culture result from pulmonary specimen (Sputum, BAL,Biopsy,pleural) ,or extrapulmonary specimens ( Cerebrospinal fluid, blood,tissue biopsy)
Age < 18 years old