A 7-year-old female presented with an ear ache, cough, and sore throat. Examination found a crackling, wheezing cough. Tests revealed left lower lobe pneumonia. Serologic testing showed positive IgM and IgG antibodies for Chlamydiophilia pneumoniae, indicating the cause of infection. C. pneumoniae is an intracellular bacterium that can cause respiratory infections ranging from mild to severe pneumonia. It is treated with macrolide antibiotics.