Eosinophilia due to multiple parasitic infection

Eosinophilia is a common feature of many allergic and parasitic diseases. In the tropics multiple parasitic infection is often responsible for eosinophilia. The following illustrates this problem arising in the U.K. in a patient in whom tests for amoebiasis, filariasis, schistosomiasis and fascioliasis were all positive. Despite being treated for these conditions, the patient's symptoms did not resolve until he was treated for strongyloides infection which was found only after the 19th stool examination.