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Strongyloides (from Greek strongylos, round, + eidos, resemblance), anguillula, or threadworm is a genus of small nematode parasites, belonging to the family Strongylidae, 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.
As the infection continues and the larvae mature, there may be respiratory symptoms (Löffler's syndrome). The infection may then become chronic with mainly digestive symptoms. There may be respiratory, skin, and digestive symptoms of reinfection (when larvae migrate through the body) from the skin to the lungs and finally to the small intestine.
Strongyloides stercoralis is a human pathogenic parasitic roundworm causing the disease strongyloidiasis. Its common name in the US is threadworm . In the UK and Australia, however, the term threadworm can also refer to nematodes of the genus Enterobius , otherwise known as pinworms .
Symptoms tend to be brief, but can range from mild to severe and include: fever, vomiting, increased respirations or difficulty breathing, cough, wheeze, and rash. Symptoms typically follow an exposure to allergens or certain drugs, and last approximately two weeks. [3] Eosinophilia is the main feature of diagnostic criteria for Loffler's syndrome.
Some species such as those infecting rodents can use either the oral or percutaneous route. There are unusual features in the development and transmission of some Trichostrongyloidea species. For example, Ollulanus tricuspis, which infects the stomach of pigs, is autoinfective: the sole means of transmission is through the pig vomiting ...
This is caused by Strongyloides stercoralis.Even though the disease is principally a soil-transmitted helminthiasis, the infection being mediated through contaminated soil, it is however generally omitted in clinical practices and control programmes because of its (allegedly) relatively less significant influence on health and socio-economic conditions.
Larva currens (Latin for racing larva), is an itchy skin condition caused by infections with Strongyloides stercoralis. [2] [3]It is caused by the intradermal migration of strongyloides and distinguished from cutaneous larva migrans (caused by hookworm) by its rapid migration, perianal involvement and wide band of urticaria.
Strongyloides westeri, commonly referred to as intestinal threadworm, is a species of small nematode parasite in the family Strongylidae.Strongyloides (from Greek strongylos, round, + eidos, resemblance) are commonly found in the small intestine of mammals (generally horses and monkeys, specifically foals), that are characterized by an unusual lifecycle (Larvae II, III) that involves one ...