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infection with Strongyloides stercoralis. The worms usually inhabit the small intestines, causing intestinal strongyloidiasis with diarrhea and ulceration of the mucosa. At a later stage in their life cycle they may penetrate the skin and be carried to the lungs, causing pulmonary strongyloidiasis with hemorrhaging. Called also strongyloidosis.
Infection with soil borne nematodes of the genus Strongyloides, considered to be a parthenogenetic parasitic female. Larvae passed to the soil develop through four larval instars to form free-living adults or develop from first and second free-living stages into infective third-stage strongyliform or filariform larvae, which penetrate the skin or enter the buccal mucosa through drinking water. Infection can occur by larvae of a new generation developed in the soil (indirect cycle), by infective larvae developed without an intervening adult stage (direct cycle), or by larvae that develop directly in the feces within the intestine of the host, penetrate the mucosa, and pass by blood/lung sputum migration back to the intestine (autoreinfection); most serious human infections and nearly all fatalities result from autoreinfection and subsequent disseminated infection, which commonly follow immunosuppression by steroids, adrenocorticotropic, or other immunosuppressive agents. Autoreinfection also may develop in patients with AIDS.
strongyloidosis/stron·gy·loi·do·sis/ (-do´sis) strongyloidiasis.
infestation with the nematode strongyloides, a parasite of the small intestine. Can cause dermatitis and balanoposthitis due to percutaneous entry, or diarrhea when the intestinal infection is very heavy. In kangaroos it is a stomach parasite causing gastritis. Strongyloides papillosus may be associated with the introduction of organisms into the skin of the feet, causing footrot.