Biology Unit 6 - TB 0.0 / 5 ? BiologyHealth, illness and diseaseA2/A-levelEdexcel Created by: lauraking20Created on: 11-06-17 12:45 What is the bacteria? Mycobacterium Tuberculosis 1 of 8 How does infection occur? When tiny droplets containing the bacteria are inhaled into the lungs (person coughs/sneezes) 2 of 8 How does the bacteria survive? Is taken up by phagocytes and survives & replicates inside these 3 of 8 Why don't most people develop TB straight away? Their immune system seals off the infected phagocytes in structures in the lungs called tubercles 4 of 8 Reactivation more likely in what people? People with weakened immune systems - e.g, with AIDS 5 of 8 What does the dormant bacteria do? Becomes reactivated and overcomes the immune system - causing TB 6 of 8 Initial symptoms? Coughing, general weakness, fever etc 7 of 8 How can it cause death? Can damage lungs = respiratory failure / organ failure in other areas of body 8 of 8
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