infectious diseases

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  • infectious diseases
    • TB
      • global inpact
        • around 1% of the world's population. is newly infected every year.
          • around 10- 15 % develop in to the diease
        • in 2005 8.8 million new causes were found and 1.6 died million died.
        • its possible that up to  30 % of the worlds population could be infected, however the bacterium is not active or controlled by the immune sytem. its there fore considered a threat.
          • it also develops mycobacterium strains that are resitant to  anti biotics.
            • this if fully developed could pose a major problem for the WHO
      • trasmittion
        • is caused by 2 types of mycobacterium.      M.bovis and mycobacterium tuberculosis
        • TB is spread though droplet infection
          • droplet infection is though droplets of fluid spreading diease
            • such as talking coughing and sneezing.
        • in developing country's TB can be spread though milk, meat and cattle.
    • HIV/AIDS
      • global impact
        • hiv is a word wide diease. and is still spreading in panadmic proportions.
          • 5 million a year are averagly infected
            • at the end of 2005. 30 million had died from hiv/aids.
      • tranmittion
        • hiv is a immune diffency virus.
          • when you get aids your known as hiv positive
            • when the virus then becomes active it destroys the helper t cells thst prevent infection
        • spread though bodily fluid transmittion.
    • Maleria
      • transmittion
        • malaria is caused by the eurkarot organism of which there are many varitys. eg P.vitrax
        • malaria is spread by a vector.
        • The female mosquito carries the plasmodium from an infected person to  a uninfected person
        • malaria parasites live in the red blood cells of there host and live in the haemoglobin of the red blood cells
          • an infected person / gamete of plasmodium in blood/ female mosquito/ gose in to salivary glands of mosiqutos/ to a unifected person/ plasmodium travels to the liver/ plasmodium travels to the blood / infected person
      • global impact
        • kills around 3 million per year.
        • infects around 300 million a year world wide
        • malaria can only survive in locations where the anopheles moquto can survive.
        • 90 % live in sub shara


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