Types of Disease
- Created by: India.02
- Created on: 10-05-19 11:42
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- Types of Disease
- Viral Diseases
- Measles
- Spread by droplets from an infected person's sneeze or cough
- Red skin rash and signs of fever
- Can be serious or fatal if there are complications - lead to pneumonia or a brain infection called encephalitis
- Most are vaccinated against it at birth
- HIV
- Spread by sexual contact or by the exchange of bodily fluid - blood - when people share needles or drugs
- Initially causes flu-like symptoms - usually other symptoms aren't experienced for many years
- HIV can be controlled with antiretroviral drugs - stop virus replicating
- Virus attacks immune cells - if system is badly damaged it can't cope with other infections or cancers - at this stage the virus is known as late stage HIV infection or AIDS
- Tobacco Mosaic Virus
- TMV - virus that affects many species of plants - tomatoes - causes mosaic pattern on leaves - parts of plants become discoloured
- Discolouration means plants can't photo-synthesise as well - virus impacts growth
- Measles
- Fungal Disease
- Rose Black Spot Fungus - purple or black spots develop on leaves of rose plants - leaves turn yellow and drop off
- Spreads through environment in water or by wind
- Gardeners can treat using fungicides and by ********* the plant of its affected leaves - leaves need to be destroyed so that the fungus can't spread elsewhere
- Less photo-synthesis can happen so the plant doesn't grow very well
- Rose Black Spot Fungus - purple or black spots develop on leaves of rose plants - leaves turn yellow and drop off
- Protists
- Malaria - part of the malarial protist's life cycle takes part in a mosquito
- Mosquitoes are a vector - pick up disease when feeding on an infected animal
- Every time the mosquito feeds on an animal it infects it by inserting the protest into the blood vessels
- Episodes of fever - can be fatal - can be protected by insecticides and mosquito nets
- Mosquitoes are a vector - pick up disease when feeding on an infected animal
- Malaria - part of the malarial protist's life cycle takes part in a mosquito
- Bacterial Diseases
- Salmonella
- Type of bacteria that causes food poisoning
- Infected people can suffer from fever, stomach cramps, vomiting and diarrhoea
- Caused by the toxins that the bacteria produce
- Can get salmonella food poisoning by eating food that's contaminated with the bacteria
- Infected people can suffer from fever, stomach cramps, vomiting and diarrhoea
- Type of bacteria that causes food poisoning
- Gonorrhoea
- An STD - passed on by sexual contact and caused by bacteria
- The infected person will get pain when they urinate - thick yellow or green discharge from the genetals
- Originally treated with penicillin - harder to do now because certain strains of bacteria are resistant
- People can be treated with antibiotics and should use contraception barrier methods
- Salmonella
- Viral Diseases
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