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Helicobacter pylori bacterium

Helicobacter pylori bacterium. Colouredtrans- mission electron micrograph (TEM) of asingle Helicobacter pylori bacterium (formerlyknown as Campylobacter pyloridis). Thisgram-negative bacillus (rod-shaped) bacterium iscurved (as here) or sometimes spiral in shape.Numerous hair- like flagellae are visible (atupper left). Colonies of H. pylori occur onthe stomach mucous membrane in people who sufferfrom gastritis, and this bacteria has been linkedto stomach ulcer formation. H. pylori may alsobe a co-factor for gastric cancer as its presenceincreases the risk of stomach tumours. Negativelystained. Magnification: x16, 650 at 6x7cm size.. Stunning Photo Gifts From Science Photo Library