[Strongyloides stercoralis infestation in an immunocompetent 82-year-old woman].

A laboratory finding of eosinophilia in patients with gastrointestinal symptoms should prompt the differential diagnosis of a parasitosis. The diagnosis is based on identification of larvae in three different stool samples. We report the case of an 82-year-old woman who was independent for instrumental and advanced activities of daily living and showed no risk factors for strongyloidiasis who was admitted to our service with diarrhoea and abdominal pain. Blood examination showed peripheral eosinophilia of 38%. Stool sample revealed Strongyloides stercoralis. In the patient's case history, we found similar clinical features with fluctuating eosinophilia over the previous 8 years. The patient was treated with albendazole, resulting in clinical improvement and elimination of eosinophilia.