Caption

Helicobacter pylori bacteria. Coloured scanning electron micrograph (SEM) of Helicobacter pylori bacteria (pink), a cause of gastritis (stomach lining inflammation). These Gram- negative, rod- shaped, bacteria are commonly found in the mucosal lining of the stomach in middle-aged people. Their presence is also associated with the formation of ulcers in the duodenum (part of the small intestine). Magnification: x3100 at 6x7cm size.