AQA · Biology · 8461
GCSE Biology: Communicable (infectious) diseases
Infection and response · AQA GCSE Biology (8461), specification point 4.3.1.1. Cards are generated from the exam board's own specification for "Communicable (infectious) diseases", and every card links back to the page it came from. Specification © AQA — used with attribution.
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What is a pathogen?
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A microorganism that causes infectious disease.
By what three routes can pathogens be spread?
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Direct contact, water, and air.
How do bacteria make us feel ill?
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They produce poisons (toxins) that damage tissues.
How do viruses cause damage to the body?
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They live and reproduce inside cells, causing cell damage.
Which two types of pathogen may reproduce rapidly inside the body?
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Bacteria and viruses.
Can pathogens infect plants as well as animals?
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Yes — pathogens may infect both plants and animals.
What is a communicable disease?
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An infectious disease that can be spread from one organism to another, caused by a pathogen.
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