# Billede:Head of Enterobius vermicularis human pinworm 5230 lores.jpg

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Head_of_Enterobius_vermicularis_human_pinworm_5230_lores.jpg‎ (68KB, MIME type: `image/jpeg`)

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Description | ID#: 5230 Description: This micrograph reveals the cephalic alae in the head region the nematode Enterobius vermicularis, or human pinworm. The time between ingestion of infective eggs to oviposition by the adult females is about 1 mo. The life span of the adults is about 2 mo. Gravid females migrate nocturnally outside the anus, and oviposit while crawling on the skin of the perianal area.

Content Providers(s): CDC Creation Date: 1982

Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.

Source | http://phil.cdc.gov/PHIL_Images/20031203/b7bd0d1f000c46de9e3f323497870e02/5230_lores.jpg
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| This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision.

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