Pathogens

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What is a pathogen?
A bacteria, virus, or fungi which is harmful and causes disease.
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What must a pathogen do in order to be considered as one?
Gain entry to the host; colonise tissues; resist defences; cause damage to tissues.
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When does infection occur?
When a pathogen gains entry to the host and colonises its tissue.
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When does disease occur?
When an infection leads to symptoms.
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What is transmission?
When a pathogen is transferred from one person to another.
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What 2 interfaces are common points of entry for pathogens?
The gas exchange system & the digestive system.
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Name some natural defences the body produces towards the entry of pathogens?
Mucous layer covering exchange surfaces (thick barrier - hard to penetrate); enzymes (to break down); stomach acid.
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Name 2 ways pathogens cause disease.
Damaging host tissues & Producing toxins.
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What is related to how quickly a pathogen causes damage?
How rapidly it divides.
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Other cards in this set

Card 2

Front

What must a pathogen do in order to be considered as one?

Back

Gain entry to the host; colonise tissues; resist defences; cause damage to tissues.

Card 3

Front

When does infection occur?

Back

Preview of the front of card 3

Card 4

Front

When does disease occur?

Back

Preview of the front of card 4

Card 5

Front

What is transmission?

Back

Preview of the front of card 5
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