Background: Acute eosinophilic pneumonia (AEP) is characterized by a febrile illness, diffuse pulmonary infiltrates, and pulmonary eosinophilia. The etiology of AEP remains unknown, but several ...

Acute infection can be excluded by evidence ... slight malaise and always with blood eosinophilia. In chronic eosinophilic pneumonia the pulmonary lesions are extensive, persistent or progressive ...

The durations of symptoms prior to hospital admission was within 2 weeks (mean, 3.5 days; range, 1 to 11 days), indicating acute onset of ... a maker of interstitial pneumonia.