Epidemiology
S. intermedius infections have been described in a wide age range: For example, Nakagawa et al. reported a lung abscess and empyema caused by S. intermedius in an immunocompetent 6-month-old boy6, while Yanagihara et al. reported a brain abscess as a complication of hepatopulmonary syndrome coexisting with interstitial pneumonia in a 76-year-old woman 7. However, the oldest patient reported was 80 years old and developed an empyema and a psoas abscess due to S. intermedius 8. Our patient was also in this wide age range. Regarding the sex predominance, respiratory infections due to SAG have been described more frequently in male patients with comorbid diseases who are typically complicated by pleural effusion 9.