Fighting Disease
- Created by: izzygreenxoxo
- Created on: 24-03-17 17:33
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- General
- Fighting Disease
- Vaccination
- Protects from future infections
- When infected - takes a few days for white blood cells to attack
- Vaccination - dead/inactive micro-organisms
- Carry antigens, cause antibodies to attack
- Live micro-organisms ente afterwards - react quicker
- Some vaccinations 'wear off' - booster injections
- Pros
- Control infectious diseases that were common in UK
- Prevent epidemics
- Cons
- Don't always work
- Can have bad reactions (rare)
- Protects from future infections
- Drugs
- Relieve or cure?
- Painkillers - relieve
- Don't solve the problem just stop the problem for a while
- Cold remedies - don't cure, just reliev symptoms
- Antibiotics - kill/cure symptoms
- Different antibiotics for different viruses - need right one
- Antibiotics don't destroy viruses (only bacteria) viruses harder to kill
- In cells - can only kill cells
- Painkillers - relieve
- Resistant
- Bacteria - mutate
- Resistant to antibiotics (antibiotic resistant bacteria)
- Only non-resistant bacteria is killed by treatments
- Leftover bacteria survive (natural selection)
- Resistant straincancause serious infection -can't be treated
- Avoid over-prescribing antibiotics
- Bacteria - mutate
- Relieve or cure?
- Past and Future
- Semmelweis
- Vienna general hospital - 1840s
- Sawwomen dyingafter childbirth from puerperal fever
- Believed it was spread by doctors unclean hands
- Told thgem to use antiseptic
- Antiseptic - killed bacteria
- Semmelweis couldn't prove why what he did worked - practice dropped when he left hospital
- Antibiotic resistance
- Becoming more common
- Bacteria
- Mutate - new strains
- Antibiotic-resistant
- new strain - no immunity
- new strain - spreads rapidly
- Viruses
- mutate often - hard to develop vaccines (different antigens)
- Deadly + infectious virus = very bad
- Precautions - vaccines, antiviral drugs
- Flu pandemic - kill billions
- Semmelweis
- Vaccination
- Pathogens
- Bacteria
- Very small living cells (1/100th body cell)
- Damage cells
- Produce toxins
- Reproduce rapidly in body
- Virus
- Not cells
- tiny (1/100th bacteria)
- Replicate using cells 'machinery,
- Cell bursts when too many virus inside
- Cell damage makes you feel ill
- Bacteria
- Defence system
- Skin, hair, mucus - respiratory tract
- Platelets prevent micro-organisms getting in cuts
- Immune system
- White blood cells
- White blood cells
- Consume
- Engulf foreign cells and digest them
- Produce antibody
- Molecules (antigens) on surface
- Foreign antigen - produce proteins (antibodies)
- Antibodies rapidly produce
- Carried round body to kill similar antigens
- Antibodies rapidly produce
- If someone is infected agin - immune
- Like chicken pox
- Produce antitoxins
- Counteract toxins produced by invading bacteria
- Consume
- Fighting Disease
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