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.