Bacillus cereus is a gram-positive bacillus that is ubiquitously present in the environment, often regarded as a contaminant when isolated in clinical testing. Cases of B. cereus causing lower respiratory tract infections are sparse, with less than 20 reported in the literature, and
Bacillus species are identified as pathogens in lung and pleural space infections with increasing frequency. We report a patient who developed life-threatening complications of Bacillus cereus pneumonia, including massive hemoptysis, acute respiratory failure, tension pneumothorax, empyema, and