A 67-year old man visited our hospital because of cough and sputum. Chest radiograph revealed various consolidations of the bilateral lung fields. Eosinophilic pneumonia was diagnosed by transbronchial lung biopsy speciments. The clinical course and the treatment with corticosteroids improved chest radiographic findings quickly confirmed the diagnosis of chronic eosinophilic pneumonia. Based upon the significant elevation and variation of serum parainfluenza virus (PIV) 3 antibody titer, it was suggested that PIV 3 caused the chronic eosinophilic pneumonia.
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