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Ascariasis_LifeCycle_-_CDC_Division_of_Parasitic_Diseases.png (435 × 443 pixels, file size: 40 KB, MIME type: image/png)

Summary

Description

Adult worms 1 live in the lumen of the small intestine. A female may produce approximately 200,000 eggs per day, which are passed with the feces 2. Unfertilized eggs may be ingested but are not infective. Fertile eggs embryonate and become infective after 18 days to several weeks 3, depending on the environmental conditions (optimum: moist, warm, shaded soil). After infective eggs are swallowed 4, the larvae hatch 5, invade the intestinal mucosa, and are carried via the portal, then systemic circulation to the lungs . The larvae mature further in the lungs 6 (10 to 14 days), penetrate the alveolar walls, ascend the bronchial tree to the throat, and are swallowed 7. Upon reaching the small intestine, they develop into adult worms 8. Between 2 and 3 months are required from ingestion of the infective eggs to oviposition by the adult female. Adult worms can live 1 to 2 years.

From http://www.dpd.cdc.gov/dpdx/HTML/ImageLibrary/Ascariasis_il.asp?body=A-F/Ascariasis/body_Ascariasis_il11.htm
Source US gov
Author US gov
Other versions Derivative works of this file:  Ascariasis LifeCycle - CDC Division of Parasitic Diseases-gl.gif

Licensing

Public domain
This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.

Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2005-04-06 16:36 Tagishsimon 435×443×7 (30680 bytes) Adult worms 1 live in the lumen of the small intestine. A female may produce approximately 200,000 eggs per day, which are passed with the feces 2. Unfertilized eggs may be ingested but are not infective. Fertile eggs embryonate and become infective af

Original upload log

Date/Time Dimensions User Comment
12 November 2006, 22:15:52 435 × 443 (30680 bytes) The cat (talk · contribs) http://en.wikipedia.org/wiki/Image:Ascariasis_LifeCycle_-_CDC_Division_of_Parasitic_Diseases.gif

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checksum

c62b0f95f7249023b5844aa7f9e87ac9ebe0ec00

determination method or standard: SHA-1

data size

41,312 byte

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443 pixel

width

435 pixel

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Date/TimeThumbnailDimensionsUserComment
current12:46, 18 August 2014Thumbnail for version as of 12:46, 18 August 2014435 × 443 (40 KB)GifTaggerBot: Converting file to superior PNG file. (Source: Ascariasis_LifeCycle_-_CDC_Division_of_Parasitic_Diseases.gif). This GIF was problematic due to non-greyscale...

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