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GCSE Biology · key term
The movement of a pathogen from an infected source to another organism.
Used by AQA and OCR
Specification 4.3.1.1 · Paper 1
The transfer of a pathogen from one organism or source to another organism.
Revise: Infectious Disease SpreadAirborne transmission occurs when pathogens are carried through the air. Coughing, sneezing, talking and singing can release droplets or smaller respiratory particles containing pathogens, which another person may inhale. Fungal spores that infect plants can also be carried through the air.
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Spread of DiseaseAnimals and plants can all be hosts, and transmission can sometimes occur between different species.
Link each control measure to the transmission route it interrupts. For example, ventilation reduces the inhalation of pathogen-containing respiratory particles.
Keep entry route and transmission route distinct: for example, contaminated food is the vehicle of transmission, while the pathogen enters the body through the digestive system.
When asked how a measure prevents disease, link it to a transmission route: for example, sanitation removes pathogens from water or surfaces, so fewer reach a new host.
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