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The pinworm (species Enterobius vermicularis), also known as threadworm (in the United Kingdom, Australia and New Zealand) or seatworm, is a parasitic worm. It is a nematode (roundworm) and a common intestinal parasite or helminth , especially in humans. [ 7 ]
The cause of a pinworm infection is the worm Enterobius vermicularis. The entire lifecycle – from egg to adult – takes place in the human gastrointestinal tract of a single human host. [12] [17] This process is two to eight weeks. [18] [9]
These actions may instigate entry into the dauer state (L1 alae), exiting of the dauer state (pheromone and or presence of an indicator for food availability), for sexual reproduction where the area around the vulva and gonads of the female and male use this family of receptors (RAM-5) where the nematode is likely to identify that reproductive ...
Once in the trachea, the worms are coughed up into the pharynx and then swallowed again, after which they pass through the stomach and into the small intestine, where they mature into adult worms. [ 5 ] [ 7 ] The adult worms begin producing fertilized eggs within 60–65 days of being swallowed; [ 7 ] females produce as many as 200,000 eggs per ...
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.
The most common intestinal parasites in the United States are Enterobius vermicularis, Giardia lamblia, Ancylostoma duodenale, Necator americanus, and Entamoeba histolytica. [70] In a developing country like Bangladesh, the most common species are round worm (Ascaris lumbricoides), whipworm (Tricurias tricuras) and hookworm (Ancylostoma ...
Since the prior Gardasil 4 vaccine was introduced in 2006, infections of HPV strains that cause most cancers and genital warts have dropped 88% in teenage girls and 81% in young adult women, CDC said.
The adult female worm resides within the adult male worm's gynaecophoric canal, which is a modification of the ventral surface of the male, forming a groove. The paired worms move against the flow of blood to their final niche in the mesenteric circulation, where they begin egg production (>32 days).
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