We report a 7-year-old girl who got Mycoplasma pneumoniae infection with prolonged fever. Macrolide was used on day 14 of illness but fever persisted with progressive lung consolidation. Oral prednisolone was administered on day 33 then fever subsided with dramatically clinical improvement (decreased CRP and resolution of lung consolidation). In this case, delayed effective antibiotic treatment with inflammation may be the major factor contributing to the fever rather than ongoing infection.
