A Case of Toxocariasis with Eosinophilic Pleural Effusion

A 76 year-old man admitted for general malaise with fever was found in clinical examination on admission to have eosinophilic pleural effusion, peripheral eosinophilia, and a slightly elevated inflammatory reaction. Immunological examination, including microplate ELISA, showed a high titer of specific antibody againstToxocara canisin both the serum and pleural effusion. We started treatment using albendazole, and found inflammatory findings and serum IgE were ameliorated. Parasitic disease is an important consideration in the differential diagnosis of eosinophilic pleural effusion, and serology is useful in screening for this.