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GCSE Biology · key term
A genus of bacteria associated with stomach ulcers; the relevant species is commonly called Helicobacter pylori.
Used by Edexcel
Specification 5.5, 5.6 · Paper 1
Revise: Bacterial Infections: Cholera, TB and Stomach UlcersBacteria called Helicobacter, commonly Helicobacter pylori, can cause stomach ulcers. An ulcer is a break or sore in the lining of an organ. Here, the bacterium is the pathogen and the stomach ulcer is the resulting damage.
A bacterium that can infect the stomach lining and cause stomach ulcers.
Link each infection to both its pathogen type and its stated effect: cholera — bacteria — diarrhoea; tuberculosis — bacteria — lung damage; Helicobacter — bacteria — stomach ulcers.
Do not describe a stomach ulcer itself as a pathogen. The pathogen is a Helicobacter bacterium; the ulcer is damage associated with the infection.
Do not describe cholera and Helicobacter as viruses: both are caused by bacteria.
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