LIFE CYCLE OF ENTEROBIUS VERMICULARIS PDF

Another putative pinworm species, Enterobius gregorii , has been described and reported from humans in Europe, Africa, and Asia. However, further morphologic and molecular evidence suggests E. The rat pinworm, Syphacia obvelata , has also very rarely been reported infecting humans. Gravid adult female Enterobius vermicularis deposit eggs on perianal folds. Infection occurs via self-inoculation transferring eggs to the mouth with hands that have scratched the perianal area or through exposure to eggs in the environment e.

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Pinworm infection , also known as enterobiasis , is a human parasitic disease caused by the pinworm. The disease is spread between people by pinworm eggs. Treatment is typically with two doses of the medications mebendazole , pyrantel pamoate , or albendazole two weeks apart.

Pinworm infections commonly occur in all parts of the world. One-third of individuals with pinworm infection are totally asymptomatic. Pinworms cannot damage the skin, [14] and they do not normally migrate through tissues.

The cause of a pinworm infection is the worm Enterobius vermicularis. The entire lifecycle — from egg to adult — takes place in the human gastrointestinal tract of a single human host.

Pinworm infection spreads through human-to-human transmission , by swallowing infectious pinworm eggs. After the eggs have been initially deposited near the anus, they are readily transmitted to other surfaces through contamination. The life cycle begins with eggs being ingested. Diagnosis depends on finding the eggs or the adult pinworms. Scotch Tape applied on the anal area will pick up deposited eggs, and diagnosis can be made by examining the tape with a microscope. Pinworms do not lay eggs in the feces , [20] but sometimes eggs are deposited in the intestine.

Pinworm infection cannot be totally prevented under most circumstances. Preventive action revolves around personal hygiene and the cleanliness of the living quarters. The main measures are keeping fingernails short, and washing and scrubbing hands and fingers carefully, especially after defecation and before meals. Medication is the primary treatment for pinworm infection. The benzimidazole compounds albendazole brand names e. Pinworm infection occurs worldwide, [10] and is the most common helminth i.

The earliest known instance of pinworms is evidenced by pinworm eggs found in coprolite , carbon dated to BC at western Utah. Garlic has been used as a treatment in the ancient cultures of China, India, Egypt, and Greece. From Wikipedia, the free encyclopedia. This article is about the human infection with pinworms.

For the organism itself, see Pinworm parasite. Archived from the original on 15 October Retrieved 16 October Archived from the original on 18 October Journal of Pediatric Gastroenterology and Nutrition. Rook's Textbook of Dermatology, 4 Volume Set 9 ed. Archived from the original on 5 November Companion Encyclopedia of the History of Medicine.

World Health Organization. WHO Media Centre. Archived from the original on 7 December Retrieved 6 December Pharmacognosy Reviews. Beograd: Naucna knjiga; Farmakognozija; pp.

Tucakov J. Beograd: Kultura; Lecenje biljem - fitoterapija; pp. International Journal of Dermatology. December The Journal of Parasitology. Retrieved 8 April Merriam-Webster's Medical Dictionary. NCBI taxonomy database. National Center for Biotechnology Information, U. National Library of Medicine. Archived from the original on 27 November Parasitology Research.

Hugot JP Journal of Parasitology. Diagnostic pathology of parasitic infections with clinical correlations PDF Second ed. Oxford University Press. Retrieved 21 August Manson's tropical diseases Twentysecond ed. Saunders Elsevier. Retrieved 18 November Retrieved 5 December Cook GC September Garcia, Lynne Shore Practical guide to diagnostic parasitology. American Society for Microbiology. Caldwell JP February Canadian Family Physician. Vanderkooi M Village Medical Manual 5th ed.

Infectious diseases Parasitic disease : helminthiases B65—B83 — Fasciolopsis buski Fasciolopsiasis Metagonimus yokagawai Metagonimiasis Heterophyes heterophyes Heterophyiasis.

Diphyllobothrium latum Diphyllobothriasis Spirometra erinaceieuropaei Sparganosis Diphyllobothrium mansonoides Sparganosis. Dracunculus medinensis Dracunculiasis.

Strongyloides stercoralis Strongyloidiasis Trichostrongylus spp. Trichostrongyliasis Halicephalobus gingivalis. Enterobius vermicularis Enterobiasis Pinworm. Biology portal Medicine portal. Categories : Colorectal surgery Parasites of equines Helminthiases Parasitic infestations, stings, and bites of the skin Foodborne illnesses.

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Enterobiasis, oxyuriasis [1]. Pinworm eggs Enterobius vermicularis. Infectious disease. Itchy anal area [1]. Pinworms Enterobius vermicularis [3]. Attending school [1]. Seeing the worms or eggs [1]. Handwashing , daily bathing in the morning, daily changing of underwear [1]. Mebendazole , pyrantel pamoate , or albendazole [4].

Non serious [5]. Common [1] [5]. Secernentea Spiruria Camallanida Dracunculus medinensis Dracunculiasis.

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What Are Pinworms?

Eggs are deposited on perianal folds 1. Self-infection occurs by transferring infective eggs to the mouth with hands that have scratched the perianal area 2. Person-to-person transmission can also occur through handling of contaminated clothes or bed linens. Enterobiasis may also be acquired through surfaces in the environment that are contaminated with pinworm eggs e.

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File:Enterobius vermicularis LifeCycle.gif

Pinworm infections are typically called enterobiasis, but are also sometimes known as oxyuriasis or threadworm. Among high risk groups — children under age 18, institutionalized people, and those who take care of infected people — the prevalence of pinworm infection can reach 50 percent. Adult female pinworms deposit thousands of eggs on the perianal skin the area around the anus. You may directly expose yourself to these eggs by scratching the contaminated area and then putting your fingers in your mouth. Once on your fingers, the microscopic eggs can also transfer and attach to many different surfaces — including toys, bedding, clothing, towels, toilet seats, sandboxes, food, drinking glasses, and utensils — where they can survive for 2 to 3 weeks if the surfaces aren't cleaned, according to the CDC.

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Enterobiasis

Another putative pinworm species, Enterobius gregorii , has been described and reported from humans in Europe, Africa, and Asia. However, further morphologic and molecular evidence suggests E. The rat pinworm, Syphacia obvelata , has also very rarely been reported infecting humans. Gravid adult female Enterobius vermicularis deposit eggs on perianal folds. Infection occurs via self-inoculation transferring eggs to the mouth with hands that have scratched the perianal area or through exposure to eggs in the environment e.

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