Threadworm - is a parasitic roundworm (nematode) and one of the most common parasites, especially in children. Threadworm infestation is called enterobiasis. Threadworms live in the lower part of the small intestine and in the upper part of the large intestine , but in recent years has been noticed their migration to other organs and systems of human This factor was detected by diagnostic of the whole organism by vegetative resonance test (VRT).
Threadworms have the form of a small thin nematode (for example, roundworm). The adult female reaches a length of 8 to 13 mm and 0.5 mm thick. It has a long form and straight tail. Adult males are much smaller. Its length ranges from 2mm to 5mm and has a 0.2 mm in thickness. A male has a curved tail, unlike the female. Reproduction of threadworms is as follows: the female descends into the rectum and lays from 5,000 to 15,000 eggs, size of 50 to 60 microns, the eggs have a thick shell. Maturation of threadworms eggs lasts for 4-6 hours.
The entire life cycle, from egg to adult parasite, threadworms spend in the gastrointestinal tract of man. Lifecycle begins in the duodenum from the egg, which is ingested. After hatching the egg the larvae begin a rapid growth and migrate through the small intestine towards the colon. During migration, they molt twice and become adults. Females live on an extent from 5 and 13 weeks, and males about 7 weeks. Fertilization occurs in the ileum, after which male usually dies. Pregnant females are deposited in the ileum, cecum, ascending intestine, where they attach to the mucosa. Almost all of the pregnant body of the female is filled with eggs. On average, one female contains from 5,000 to 15,000 eggs. Oviposition begins about five weeks after fertilization. The females emerge from the anus and lay eggs, and then they die. The females emerge from the anus to produce oxygen, which is necessary for the maturation of eggs.
Threadworms are spread from person to person or from human to animal. In a humid environment the eggs can remain intact for up to three weeks. They do not tolerate heat, but can easily survive at low temperatures. Two-thirds of the eggs remain viable after 18 hours at -8 degrees Celsius. After the eggs were originally deposited on the surface of the anus, they are easily transferred to other surfaces and thus threadworm eggs have the ability to spread.