Disease

  • Created by: erin.c13
  • Created on: 15-03-18 16:41
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  • Disease
    • Viruses
      • Measels
        • Symptoms: fever, red rash
        • Transmission: inhalation of droplets (coughs and sneezes)
        • Treatment: none (isolation needed)
        • Extra Info: Very Infectious. Can cause blindness, brain damage or even death (in some extreme cases)
      • HIV/AIDS
        • Symptoms: mild flu-like symptoms
        • Transmission: sexual contact and exchange of bodily fluids (not saliva mostly blood from sharing needles and breast feeding) doesn't pass through vectors
        • Treatment: no cure or vaccine
        • Extra Info: 3.5 million people with HIV. Time between HIV infection and final stages of AIDS can be changed by nutrition, health, antiretroviral drugs (key to expand life expectancy) Attacks Immune System and kills immune cells so you can't fight it off
      • Tobacco Mosaic Virus (TMV)
        • Symptoms: Distinctive 'mosaic' pattern of discolouration affecting PLANT'S growth, reduce in crop yield
        • Transmission: contact between diseased plant material. Insect vectors
        • Treatment: none, but farmers grow TMV resistant strains of plant
        • Extra Info: Isolated virus - only one
    • Bacterial
      • Salmonella
        • Symptoms: 8-72hrs after receiving symptoms show. Fever, cramps, vomiting and diarrhoea
        • Transmission: under cooked food or prepared in unhygienic conditions
        • Treatment: pass after a few days and no antibiotics are given. STAY HYDRATED. Cook food throughout and wash surfaces
        • Extra Info: Poultry can be vaccinated. Salmonella can be fatal, if people don't stay hydrated or are already ill. Bacteria only found on surface of food
      • Gonorrhoea
        • Symptoms: early stages then become symptom less. Thick yellow/green discharge from penis/vagina and pain on urination. Long term pelvic pain, infertility and ectopic urination. Babies from infected mothers can be born with infected eyes and can even be blind
        • Transmission: unprotected sexual contact
        • Treatment: antibiotics and/or barrier method - condoms or reducing number of sexual partners
        • Extra Info: after first sign of it the symptoms go away so people don't bother to be treated -> that's why it's so dangerous
      • Bacterial disease in Plants
        • Crown Galls (mass of unspecialised cells that grow between to roots and shoots)
          • Bacteria inserts plasmids (genetic info) which cause a new mass of undifferentiated genetically modified cells to grow
          • Scientists can manipulate the bacteria so they can carry desirable genes into the plant and cells they infect e.g. grow more flowers -> more fruit
    • Fungal
      • Rose Black Spot
        • Symptoms: purple/black spots, yellow leaves which drop early (reduces photosynthesis and flowering)
        • Transmission: spores are spread by wind and remain dormant over winter making it difficult to spot the infected plants
        • Treatment: gardeners remove infected leaves and chemical fungicides are used. Roses have been bred to be resistant
    • Protists
      • Malaria
        • Symptoms: High temperature/under the weather - fever and shaking (can be fatal)
        • Transmission: vectors = female mosquitos
        • Treatment/prevention: Insecticide treated nets, insecticides, antimalarial drugs, prevent mosquito breeding -> remove standing water - spraying water. If diagnosed quickly drugs can be used.
  • -Very few fungal diseases affect people - If they infect already sick people it can be fatal - easy to treat skin fungi

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