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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File:Enterobius vermicularis LifeCycle – Wikimedia Commons
Treatment information for enterobiasis can be found at: The life span of the adults is about two months. Cross-section of an adult female E. National Library of Medicine. The life cycle begins with eggs being ingested. American Society for Microbiology. After the eggs have been initially deposited near the anus, they are readily transmitted to other surfaces through contamination.
The Journal of Parasitology. The entire lifecycle — from egg enterobihs adult — takes place in the human gastrointestinal tract of a single human host. Garcia, Lynne Shore Views Read Edit View history. Other than human, Enterobius vermicularis were reported from bonnet macaque. Pinworm infectionalso known as enterobiasisis a human parasitic disease caused by the vermiculafis.
The worm measured 1. Some small number of eggs may become airborne and inhaled. It is a nematode roundworm and a common intestinal parasite or helminthespecially in humans.
National Center for Biotechnology Information, U. International Journal of Dermatology. These would be swallowed and follow the same development as ingested eggs. One third of individuals with pinworm infection are totally asymptomatic. Note the blunt end. D ICD – Seeing the worms or eggs . The larvae migrate to the large intestine of the host and grow in size. January 10, Page last updated: Close-up of the posterior end of the worm in Figure A. Pinworms do not lay eggs in the feces but sometimes eggs are deposited in vedmicularis intestine.
Image contributed enterobkus Sheboygan Memorial Hospital, Wisconsin. Anterior end of an adult female of E. Oxyurida Parasitic nematodes of humans Parasitic nematodes of mammals Parasites enterobihs equines Parasites of primates Colorectal surgery.
Enterobius vermicularis adult worms. Egg under a light microscope.
Eggs are deposited on perianal folds. Enterobius vermicularis LifeCycle B. Enterobius vermicularis Parasitic roundworms File: Diagnostic pathology of parasitic infections with clinical correlations PDF Second ed.
Gravid females migrate nocturnally outside the anus and oviposit while crawling on the skin of the perianal area.
Enterobius vermicularis life cycle CDC lifecycles. Posterior end of the worm in Figure D.