“…(2), and our case also met these criteria. In addition, some reports stated that pulmonary M. malmoense infection was mainly complicated by chronic obstructive lung disease, such as pneumoconiosis, chronic airway infection, or pulmonary emphysema (7,8,9). Moreover, it was reported that M. malmoense infection was usually observed among HIV-negative people (2,10 (2,10,11,(13)(14)(15) …”