A case of life-threatening Chlamydia TWAR pneumonia complicated by enc
ephalitis in a young, previously healthy adult is described. The patie
nt presented with full blown adult respiratory distress syndrome and r
equired prolonged ventilatory support and rigorous antibiotic and supp
ortive care. He recovered fully without any neurologic sequelae. Chlam
ydia pneumoniae pneumonia should be included in the differential diagn
osis of the severe community acquired pneumonia, because if properly s
ought and adequately treated, may have an excellent outcome.