After a short presentation of the etiopathogenesis of this parasitosis, the authors report their observations on 35 cases of strongyloidiasis followed in the recent years. On the basis of the epidemiologic and clinical analyses of these cases, the authors show that some data, i.e. those on the environment to which the patients belong, or their occupation, and also some clinical manifestations (clinical polymorphism) may suggest the diagnosis of strongyloidiasis in the immunosuppressed in about 30% of the cases. An associated blood eosinophilia may be a more possible for the diagnosis of strongyloidiasis. The positive diagnosis has to take into consideration, beside the repeated diet exam, the method of cultures and also jejunal biopsies, which may also verify the efficiency of the treatment recommended. The authors recommend the treatment with Mintezol and, with lower results, Vermigal and Mebendazol.