Strongyloides

Threadworm
First stage larva (L1) of S. stercoralis
Scientific classification
Kingdom:	Animalia
Phylum:	Nematoda
Class:	Secernentea
Order:	Rhabditida
Family:	Strongyloididae
Genus:	Strongyloides
Species
Strongyloides akbari Strongyloides ardeae Strongyloides callosciureus Strongyloides cebus Strongyloides dasypodis Strongyloides fuelleborni Strongyloides gulae Strongyloides lutrae Strongyloides mirzai Strongyloides myopotami Strongyloides ophidiae Strongyloides papillosus Strongyloides planiceps Strongyloides physali Strongyloides procyonis Strongyloides ransomi Strongyloides ratti Strongyloides robustus Strongyloides serpentis Strongyloides stercoralis Strongyloides suis Strongyloides venezuelensis Strongyloides vituli Strongyloides westeri

Strongyloides (from Greek strongylos, round, + eidos, resemblance), anguillula, or threadworm is a genus of small nematode parasites, belonging to the family Strongyloididae, commonly found in the small intestine of mammals (particularly ruminants), that are characterized by an unusual lifecycle that involves one or several generations of free-living adult worms.

Human infection, strongyloidiasis, is chiefly caused by Strongyloides stercoralis, widespread in all tropical regions, or by Strongyloides fuelleborni, a parasite of primates in African and Asian tropics and of humans in African tropics and New Guinea. Other species include Strongyloides papillosus found in cattle, pigs, sheep, goats, rabbits, and rats, Strongyloides ransomi found in pigs, and Strongyloides ratti, found in rats.

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Wikipedia