Group F streptococcal empyema from aspiration of a grass inflorescence

A previously healthy 15-year-old boy was seen with a loculated right lower lobe empyema. Group F beta-hemolytic streptococci were cultured from the pleural fluid. Surgical intervention was required. An unsuspected aspirated grass inflorescence and a bronchopleural fistula were discovered during a decortication procedure.