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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]
Two female pinworms next to a ruler. The markings are one millimetre apart. One-third of individuals with pinworm infection are totally asymptomatic. [8] The main symptoms are itching in and around the anus and perineum. [8] [9] [10] The itching occurs mainly during the night, [9] [11] and is caused by the female pinworms migrating to lay eggs ...
red blood cells, liver blood film: tropical – 250 million cases/year Anopheles mosquito Rhinosporidiosis: Rhinosporidium seeberi: nose, nasopharynx: biopsy India and Sri Lanka nasal mucosa came into contact with infected material through bathing in common ponds Sarcocystosis: Sarcocystis bovihominis,Sarcocystis suihominis: intestine, muscle ...
In the human host, Loa loa larvae migrate to the subcutaneous tissue, where they mature into adult worms in approximately one year, but sometimes up to four years. Adult worms migrate in the subcutaneous tissues at a speed of less than 1 cm/min, mating and producing more microfilariae. The adult worms can live up to 17 years in the human host. [5]
Initial invasion through the lining of the brain, the meninges, may cause a typical inflammation of the meninges and a classic meningitis picture of headache, stiff neck, and often fever. The parasites subsequently invade deeper into the brain tissue, causing specific localizing neurological symptoms depending on where in the brain parenchyma ...
Elaeophora schneideri (arterial worm; carotid worm; cause of elaeophorosis, aka "filarial dermatitis" or "sorehead" in sheep; or "clear-eyed" blindness in elk) is a nematode which infests several mammalian hosts in North America. It is transmitted by horse-flies.
The sexes are separate in this species. The females lay eggs which are fertilised externally and develop directly into juvenile worms. [2] This ribbon worm is diurnal and makes little attempt to avoid predation. It is possible that its bright red colouration is aposemetic, giving warning that this particular ribbon worm is toxic or unpalatable. [6]
It is classified as a neglected tropical disease (NTD) and belongs to the group of diseases known as helminthiases (worm infections). [7] It can affect other animals such as pigs, cows and horses. [1] Terminology used in this field is crucial since echinococcosis requires the involvement of specialists from nearly all disciplines.