Enterobius vermicularis eggs
Enterobius vermicularis helminthes in lumina

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Enterobius vermicularis, threadworm, seatworm, pinworm

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cellular organisms - Eukaryota - Fungi/Metazoa group - Metazoa - Eumetazoa - Bilateria - Pseudocoelomata - Nematoda - Chromadorea - Oxyurida - Oxyuroidea - Oxyuridae - Enterobius - Enterobius vermicularis

Brief facts

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Infection pathways

Please keep in mind that without re-infection and autoinfection the parasite cannot continue to live in the body indefinitely: the infection stops when all egg-laying worms died (~35 days) and no eggs were swallowed or no larvae re-entered the anus within this time period.

Developmental stages

Transition from egg to adult can be completed in 2-4 weeks. Females start laying eggs in about 5 weeks after settling in the host's intestine.

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Therapy and prevention

The infection can occur and persist even in families that adhere to most stringent sanitary standards.

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