Infectious Disease
- Created by: ukgamer321
- Created on: 21-04-14 16:03
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- Infectious Disease
- Fighting Infection
- Physical Barriers
- Ear wax
- Skin
- Hydrochloric acid in stomach
- Mucus
- Cilia (tiny hairs in the nose)
- Ear wax
- Platelets (part of the blood that forms a scab)
- White blood cells
- 1. Phagocytes engulf and digest the pathogen.
- 2. Produce antitoxins which counteract toxins produced by pathogen
- 3. Lymphocytes produce antibodies
- Each invading pathogen has unique antigens on its surface
- White blood cells produce antibodies which lock on and kill any foreign antigen
- Antibodies are then rapidly produced and carried round the body
- If you're infected with the same pathogen, because of our memory cells then the antibodies are made much quicker, so the pathogen is killed before you become ill- you are immune
- Physical Barriers
- Vaccinations
- Injection of small amounts of dead/inactive micro-organisms which carry antigens
- White blood cells produce antibodies to attack the invading cell, when destroyed you beome immune to it.
- Advantages
- Controls infectious diseases that were once common (eg smallpox)
- Epidemics (disease spread in just one country) or pandemic (spreads in more than one country) prevented as people do not spread the disease because they are immune
- Disadvantes
- Bad reaction
- Sometimes may not work
- Fighting Infection
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