Roundworm Reproduction

A comprehensive overview of roundworm covering subjects like cure, treatment, symptoms, diagnostics, research, causes and pictures
Roundworm Reproduction

Roundworm reproduction

     Mature roundworms (female and male) parasites, usually in the human intestine. Can be sometimes and other sites (liver, intestine, appendix). Roundworm reproduction happens when the mature female eliminates about 240,000 eggs in about 24 hours, which reach the external environment with feces, where they can develop further because the roundworm hangs on the geohelmynt group, meaning that for development the eggs need soil.

     Because the roundworm eggs posses the thicker epidermis, which contains about 5 layers, they are kept long in soil, water, fruit, vegetables, etc., remaining invasive up to 7 years. In benefic conditions (t degrees 12 37 degrees C, humidity of more than 8%) in the eggs the embryo begins to develop. In temperature of 24-30 degrees C the first stage of larvae development takes place in the egg for 12-15 days and at temperatures below these limits are extended to several months.

     Reaching stage II of development in the environment, the larvae of the afterwards parasite hit the human intestine. In the intestine, under the action of different yeasts, the coating (cuticle) of the eggs dissolve and it releases the larvae. They migrate further, penetrating through the intestinal mucosa in the veins, then with the bloodstream they arrive in the liver, heart, pulmonary artery and then reaching the lungs. The larvae develop in the lung alveoli reaching stage III and IV.

     Latest from migrating through the pulmonary alveoli migrates through bronchial, larynx and trachea, reach in the mouth being then swallowed with saliva and reaching again in the intestine. In the intestine they reach the development stage V and mature. Roundworms reproduction larvae migration duration is 14-15 days. The overall development time of the roundworms from invasion by the time the female submission the eggs, reach 10 to 11 weeks. Duration of the mature roundworm in the human intestine does not exceed more than a year.

     Mentioned that this worm is more common in tropical, subtropical and moderate climate, where humidity is kept satisfactory. The roundworm reproduction prevalence depends on soil and climatic conditions for larval development. As a source of invasion it serves infected man, which eliminates a large amount of eggs through his feces of this pest. The outbreak mechanism is fecal-mouth.

Roundworm transmission

     As roundworm transmission factors are included: fruits, vegetables, berries, water, food, dirty hands, toys, utensils, bed and body lingerie, other household objects, infested with the matured eggs of this parasite. It may participate in human infestation and the flies through food that they catch the original. Frequently suffer from these infection children, sanitation workers, the fields of cleaning and filtering water, people in charge of fattening garden soil with human feces. In moderate climates it is often met in the spring, summer and autumn of the year.

     In the migration phase of the parasitic larvae it determines sensitivity of human body parts with change products and of decomposition of dead larvae. Roundworm reprodction develops both general hypersensitivity reactions and local eosinophilia infiltration in lungs, pneumonia, granulomatous hepatitis, rash, eosinophilia in peripheral blood, etc. A larva also poses a longer toxic action on the human body. In case of a massive invasion has importance the mechanical trauma to the bowel wall, blood vessels, liver and especially the lungs by migrating larvae of roundworm. Matured roundworms traumatize mechanic the intestine walls till they break. Unforeseen complications can cause penetration in liver, pancreas, or other means of breathing organs. Mentioned that these worms have a negative action over refreshing the body and the worst going on of various infectious diseases and non-infectious.

How roundworm spread to children?

     Contamination with roundworms is orally by ingesting food or fluids infected with worm eggs. Young children are more vulnerable to infestation with roundworm, because they tend to introduce all sorts of things in their mouth.


     Laboratory diagnosis is based on emphasizing the roundworm eggs in the stool by coprological examination, rarely through direct visualization of the larvae migration in sputum. Computer tomography and ultrasound can determine the presence of adult worms.

     In 40% of the stool exam can be negative, because during the migration and maturation eggs are not eliminated.

     Blood tests may show eosinophilia during migratory status.