File:Ulcer-causing Bacterium (H.Pylori) Crossing Mucus Layer of Stomach.jpg

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Summary

Description	English: A team of researchers from Boston University, Harvard Medical School and Massachusetts Institute of Technology have shown that the bacterium that causes human stomach ulcers uses a clever biochemical strategy to alter the physical properties of its environment, allowing it to move and survive and further colonize its host.Contact with stomach acid keeps the mucin lining the epithelial cell layer in a spongy gel-like state. This consistency is impermeable to the bacterium Heliobacter pylori. However, the bacterium releases urease which neutralizes the stomach acid. This causes the mucin to liquefy, and the bacterium can swim right through it. Read more about this research. Illustration Credit: Zina Deretsky, National Science Foundation Visit NSF’s Multimedia Gallery, at www.nsf.gov/news/mmg, for more images, and for video.
Date	11 August 2009, 04:50:40
Source	NSF Flickr photostream, http://www.flickr.com/photos/nsf_beta/4822021538/in/set-72157621768317570
Author	Illustration Credit: Zina Deretsky, National Science Foundation

Licensing

	This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File usage

The following pages on Schools Wikipedia link to this image (list may be incomplete):

Helicobacter pylori

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.

Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CS3 Windows
File change date and time	11:50, 11 August 2009
Colour space	sRGB
Image height	1,907 px
Image width	1,200 px
Date and time of digitizing	04:50, 11 August 2009
Date metadata was last modified	04:50, 11 August 2009
Short title	subglacial_lakes_1
IIM version	2

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