Viral diseases
- Created by: :-D
- Created on: 09-06-18 11:50
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- Viral diseases
- HIV/Aids
- Virus spread -> sexual contact or by exchanging bodily fluids such as blood -> happens when sharing needles-> taking drugs
- Controlled by antiretroviral drugs-> stops virus replicating in body
- Attacks immune cells
- Caused flu like symptoms
- Passed from mother to child through breast milk
- Prevent-> condoms, bottlefeeding children
- Hides inside immune system until badly damaged-> cant cope with other infections-> virus known as last stage of HIV or Aids
- Tobacco mosaic virus (TMV)
- Prevent spread-> good field of hygiene, good pest control
- Virus that affects many species of plant-> tomatoes
- Remains infectious in soil for 50 years
- Causes mosaic patterns on leaves of plants-> parts of leaves become discolored-> virus destroys cells
- Discoloration means plant cant carry out photosynthesis-> virus affects growth
- Photosynthesis important for plant growth-> produces glucose
- Spread-> contact between diseased plants and healthy plants
- Viruses
- Not cells-> tiny-> 1/100 of size of bacterium
- Cell burst-> releases all new viruses
- Cell damage-> makes you ill
- Reproduce rapidly
- Lie inside cells-> replicate themselves using cells machinery to produce copies of themselves
- Measles
- Symptoms-> develop red skin rash and fever
- Vaccinated when young
- Serious, fatal if complications-> lead to pneumonia (lung infection), encephalitis (brain infection), can cause blindness
- Spread-> droplets from infected persons sneeze or cough
- No treatment -> have to be isolated to stop spread of virus
- HIV/Aids
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