Causes and Symptoms of tuberculosis
- Created by: Peredur
- Created on: 17-12-13 09:48
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- Causes and symptoms of Tuberculosis
- Causes
- Caused by Mycobacterium tuberculosis
- Spread by coughing and sneezing near to other people
- People who are malnourished, ill or have problems with their immune system (advanced AIDS) are more vulnerable to active TB
- TB also infects cattle and people can become infected by working with infected cattle or drinking infected milk
- Symptoms
- TB infects the respiratory system by damaging the lung tissue
- Damaged lung tissue leads to coughing up blood
- TB also weakens the immune system
- Mycobacteria target T cells reducing the production of antibodies
- TB infects the respiratory system by damaging the lung tissue
- Primary infection
- once initially inhaled TB multiplies slowly
- In a healthy immune system a local inflammatory response will happen leading to a mass of tissue called a tubercule, containing dead bacteria and macrophages
- Active infection
- Some bacteria have a slime layer protecting it from the immune system
- This bacteria can then grow until the person is malnourished, weakened or the immune system does not work and the it becomes active
- Active TB bacteria then rapidly divide
- TB will eventually lead to death by lack of oxygen, or malnutrition
- Some bacteria have a slime layer protecting it from the immune system
- Causes
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