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Color enhanced transmission electron micrograph (TEM) of Helicobacter pylori. H. pylori is a Gram-negative spiral-shaped bacterium found in the mucus lining of the stomach. It causes gastritis, and is also the most common cause of stomach ulcers. It may also be a cause or co-factor for gastric cancer as its presence increases the risk of developing stomach tumors. Magnification 20,000x at 10 cm.
January 30th, 2013
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