The term “pinworm” refers to Enterobius vermicularis, a tiny, threadlike, white roundworm (formally known as a nematode) that infects the. 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. Pinworm life cycle and route of infection and reinfection3. The life cycle of pinworm . Ascaris lumbricoides (roundworm), Enterobius vermicularis (pinworm ).

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The life span of enteroius adults is about two months. These would be swallowed and follow the same development as ingested eggs. A second species, Enterobius gregoriihas been described and reported from Europe, Africa, and Asia. This micrograph reveals the cephalic alae in the head region of E. The Journal of Parasitology.

cucle It is a nematode roundworm and a common intestinal parasite or helminthespecially in humans. December 8, Content source: Other symptoms include anorexia, irritability, and abdominal pain.

Secernentea Spiruria Camallanida Dracunculus medinensis Dracunculiasis. Retrieved 5 December Image contributed by Sheboygan Memorial Hospital, Wisconsin.


Copulation takes place in human colons. Following ingestion of infective eggs, the larvae hatch in the small intestine and the adults establish themselves in the colon.

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

Pinworms are sometimes diagnosed incidentally by pathology: Retrieved 21 August Cross-section of a male E. The time interval from ingestion of infective eggs to oviposition by the adult females is about one month. Gravid females migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area.

The earliest known instance of the pinworms associated with humans is evidenced by pinworm eggs found in human coprolites carbon dated to BC found in western Utah.

Pinworm infectionalso known as enterobiasisis a human parasitic disease caused by the pinworm. Self-infection occurs by transferring infective eggs to the mouth with hands that have scratched the perianal area.

Pinworm infection occurs worldwide, [10] and is the most common helminth i.

Cook GC September Retrieved 20 October Pinworm infections commonly occur in all parts of the world. As a work of the U. Enterobius vermicularis Parasitic roundworms File: DPDx is an education resource designed for health professionals and laboratory scientists.


File:Enterobius vermicularis LifeCycle – Wikimedia Commons

Journal of Medical Case Reports. The life cycle begins with eggs being ingested. The eggs are ingested by the same or other hosts with contaminated food and drinks or directly by contaminated fingers and fingernails.

Eggs can also be found, but less frequently, in the stool, and occasionally are encountered in the urine or vaginal smears. From Wikipedia, the free encyclopedia.

Pinworm (parasite)

Oxyurida Parasitic nematodes of humans Parasitic nematodes of mammals Parasites of equines Parasites of primates Colorectal surgery. Adult male of E. Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content.