The term “pinworm” refers to Enterobius vermicularis, a tiny, threadlike, white roundworm (formally known as a nematode) that infects the. Learn about pinworms, the facts on how the infection is spread, and the life cycle of how long it lasts in humans. Gravid females move outside the anus during the night and deposit eggs in the perianal area. The larvae in the egg become infective in approximately 4 hours.

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Enterobius vermicularis is common in human children and transmitted via the faecal-oral route. Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top.

In other projects Wikimedia Commons Wikispecies. The following other wikis use this file: Here’s how it works: More commonly, however, infections are characterized by intense perianal itching pruritis ani caused by host sensations and reactions to female worms depositing sticky eggs on the skin. Egg under a light microscope.

CDC – Enterobiasis – Biology

Curiously, dogs and cats do not become infected with pin-worms so companion animals should never be considered as sources of human infection. Oxyurida Parasitic nematodes of humans Parasitic nematodes of mammals Parasites of equines Parasites of primates Colorectal surgery.


The life span of the adults is about fo months. Infectious diseases Parasitic disease: Retrieved 21 August This article is about the organism. Pinworm eggs are easily seen under a microscope.

Enterobius vermicularis life cycle

For the different nematode known as pinworm in the rest of the world, see Strongyloides stercoralis. Larvae develop within the eggs within six hours and become enteorbius. They remain viable in cool moist conditions for up to one week.

The eggs are ingested by the same or other hosts with contaminated food and drinks or directly enyerobius contaminated fingers and fingernails.

Practical guide to diagnostic parasitology.

Pinworms – Causes, Symptoms, Life Cycle & Treatment | Everyday Health

Almost the entire body of a gravid female becomes filled with eggs. Treatment should be repeated after about 10 days to kill any newly-acquired worms.

Anthelmintic treatment for pin-worm infections is readily available from most pharmacies. In British usage, however, pinworm refers to Strongyloideswhile Enterobius is called threadworm.


Life Cycle of Enterobius (With Diagram)

Numerous pin-worm species have been described from a range of mammals, birds, reptiles, amphibians, insects and millipedes, but they appear to be highly host-specific. Archived from the original PDF on 10 September They are commonly found as group infections in children, in families and in institutions where contact between individuals is high and hygiene may be low. The pinworm species Enterobius vermicularisalso known as threadworm in the United Kingdom and Australasia or seatwormis a parasitic worm.

Some small number of eggs may become airborne and inhaled. This page was last edited on 21 Septemberat Enterobius vermicularis LifeCycle pt-version. Retrieved 5 December Enterobius vermicularis LifeCycle gl.

Retrieved from ” https: January 10, Content source: Enterobius vermicularis LifeCycle B. Copulation takes place in human colons.