Strongyloidiasis is an opportunistic infection which may result in a fatal hyperinfection syndrome in immunocompromised patients. We report the case of a pulmonary infection with Strongyloides stercoralis in a 61-year-old male with a history of a long-term administration of corticosteroids. Cytologic examination of a bronchial washing specimen, processed both as conventional and as Thin-Prep smears, revealed an abundance of the typical larvae of Strongyloides stercoralis, amidst a cellular population comprising several acute inflammatory cells as well as bronchial epithelial cells with features of basal cell hyperplasia or regenerative atypia. To the best of our knowledge there is only one previous report describing Strongyloides stercoralis in thin-layer smears, and there are no previous studies comparing its morphology in conventional and thin-layer preparations.
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