Disease
- Created by: India.02
- Created on: 10-05-19 14:51
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- Disease
- Spread of Pathogens
- Water
- Pathogens can be picked up by drinking or bathing in dirty water
- Cholera is a bacterial infection that is spread by drinking water contaminated with the diarrhoea of other sufferers
- Air
- Pathogens can be carried in the air and then can be breathed in
- Some airborne pathogens are carried in the air in droplets produced when you cough or sneeze
- Direct Contact
- Touching contaminated surfaces, including the skin
- Athletes Foot - fungus that makes skin itch and flake - spread by touching the same things as an infected person - shower floors and towels
- Water
- Viruses
- Live inside cells and replicate themselves using the cells' machinery to produce many copies of themselves
- Cells will then burst and release all of the new viruses
- The cell damage is what makes you feel unwell
- Not cells - 1/100th the size of a bacterium - reproduce rapidly like bacteria
- Live inside cells and replicate themselves using the cells' machinery to produce many copies of themselves
- Bacteria
- 1/100th the size of your body cells - reproduce rapidly inside body - make you feel ill by producing toxins that damage your cells and tissues
- Fungi
- Some are single-celled and some have a body that is made up of hyphae (thread-like structures)
- Hyphae - can grow and penetrate human skin and the surface of plants - causes diseases
- Can produce spores that spread to other animals and plants
- Some are single-celled and some have a body that is made up of hyphae (thread-like structures)
- Protists
- All eukaryotes and most are single-celled
- Some are called parasites - live on or inside other organisms and can cause them damage
- Often transferred by a vector, which doesn't get the disease itself - an insect that carries the protist
- Some are called parasites - live on or inside other organisms and can cause them damage
- All eukaryotes and most are single-celled
- Pathogens
- Micro-organisms that enter the body and cause disease
- They cause communicable diseases - diseases that are easily spread
- Plants and animals can be affected by pathogens
- Micro-organisms that enter the body and cause disease
- Spread of Pathogens
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