This 1990 photograph depicted a child who was holding a strainer composed of a metal funnel, and a piece of filter cloth. Water taken from the same river, was being poured through the strainer from a bucket in order to extract the indigenous copepods, to be observed by the local inhabitants. The importance of the copepod presence lies in the fact that they are carriers of the larval 'Guinea worm' parasite, Dracunculus medinensis, and their ingestion leads to one becoming infected with Guinea worm disease (GWD). Once inside the body, the stomach acid digests the water flea, but not the Guinea worm. These larvae find their way to the small intestine, where they penetrate the wall of the intestine and pass into the body cavity. During the next 10-14 months, the female Guinea worm grows to a full size adult 60-100 centimeters (2-3 feet) long and as wide as a cooked spaghetti noodle, and migrates to the site where she will emerge, usually the lower limbs.
November 27, 2012
Why is this picture in the Public Domain?
Produced by United States Government
The file available on this page is a work of the United States government. A work of the United States government, as defined by United States copyright law, is "a work prepared by an officer or employee of the U.S. government as part of that person's official duties." In general, under section 105 of the Copyright Act, such works are not entitled to domestic copyright protection under U.S. law.
How may I use a Public Domain picture?
The file available on this page in the Public Domain. Files in the public domain have no restrictions on use and may be used for any purpose, without any conditions, commercial or not, unless such conditions are required by law.
Possible Prohibited Uses
Although a file is in the public domain, the work may still have some restrictions for use if it contains any of the following elements:
- File contains an identifiable person and such person has not provided a model release.
- File contains an identifiable building or structure and the owner of such building has not provided a property release.
- File contains a registered corporate logo or trademark.
Files containing any of the above elements that do not also have a provided release would generally fall under editorial uses only and may not be used for commercial purposes. Users downloading files that are designated as "editorial use" assume full responsibility for their use of the file(s). Depending on your use, the use of editorial use files may require additional rights that publicdomainfiles.com or the copyright owner may or may not be able to provide. You should consult with your legal counsel to be sure your use is legal.
By downloading this file, you indicate that you understand and agree to all of these terms and assume full liability for your use of the file(s) and agree to hold publicdomainfiles.com harmless should any liability arise.