Biology Unit 6 - TB

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What is the bacteria?
Mycobacterium Tuberculosis
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How does infection occur?
When tiny droplets containing the bacteria are inhaled into the lungs (person coughs/sneezes)
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How does the bacteria survive?
Is taken up by phagocytes and survives & replicates inside these
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Why don't most people develop TB straight away?
Their immune system seals off the infected phagocytes in structures in the lungs called tubercles
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Reactivation more likely in what people?
People with weakened immune systems - e.g, with AIDS
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What does the dormant bacteria do?
Becomes reactivated and overcomes the immune system - causing TB
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Initial symptoms?
Coughing, general weakness, fever etc
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How can it cause death?
Can damage lungs = respiratory failure / organ failure in other areas of body
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Other cards in this set

Card 2

Front

How does infection occur?

Back

When tiny droplets containing the bacteria are inhaled into the lungs (person coughs/sneezes)

Card 3

Front

How does the bacteria survive?

Back

Preview of the front of card 3

Card 4

Front

Why don't most people develop TB straight away?

Back

Preview of the front of card 4

Card 5

Front

Reactivation more likely in what people?

Back

Preview of the front of card 5
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