Infectious diseases- HIV, TB, Malaria

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  • Created by: vezting
  • Created on: 03-04-16 15:59
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  • infectious diseases
    • malaria
      • infecting the body
        • 1: immature plasmodium travels to liver and infects the hepatocyte cells
        • 2: in hepatocytes it multiplies and bursts the cells, entering blood stream as mature
        • 3: it then replicates in the erythrocytes
      • a parasitic pathogen caused by plasmodium
      • it is transmitted  by the female anopheles mosquito which acts as a vector
      • there are many different strains therefore many different antigens
      • there is more than one life cylce when inside the body, each stage has different antigen
      • the parasite is also concealed inside cells
      • reducing mosquitos
        • more fish to eat the larvae
        • spray some bacteria
        • make males sterile
        • mosquito nets and repellent
    • HIV
      • the disease
        • Human imunodeficiency virus
        • it destroys helper T cells and is transmitted by an exchange in bodily fluid Eg unprotected sex and blood to blood contact such as transfusions
        • there is no cure howver you can take anti-viral drugs to inhibit certain enzymes and slow down the virus
        • HIV causes aids. AIDs is when your immune system weakens and you die from other diseases that attack your immune system
      • where do you find HIV?
        • third world countires as they have less education
        • they are uneducated on sexual promiscuity  and the transmission
        • they also have fewer means such as condoms and health clinics
    • TB
      • the disease
        • caused by a bacterium caled mycobacterium tuberculosis
        • it is transmitted by inhaling droplets of an infected persons cough or sneeze
        • these infect the lungs, and our immune system builds cell walls around the bacteria creating tubercles.
          • tissue inside the tubercles dies
        • gaseous exchange becomes comprimised
      • preventing
        • BCG vaccine and antibiotics
        • TB only affects people once their immune system is comprimised Eg HIV
        • you can get it by consuming milk/meat from infected cattle
        • antibiotics are expensive and may become resistant
        • vaccine isnt always effective
        • overcrowding and poor ventilation increases spread


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