PATH 300 Lecture Notes - Lecture 5: Aureus, World Health Organization, Cytotoxic T Cell

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Infectious diseases are important cause of death world wide. Since the 90"s, deaths from diarrhea have gone down but they"re still significant. 2012: global years of life lost causes: things like pneumonia are still very high on this list. In poorer countries, death by infectious disease accounts for a much higher fraction than they do in countries like canada. Diarrhea, aids, tb, and malaria are still big problems in other areas of the world. Most infectious diseases over the past 25 years have become less prevalent, but they are still significant causes of death worldwide. Can be caused by bacteria, viruses, fungi. Zika virus: microbe spread by insects (transmitted by mosquito bite, 2016: the latest pandemic threat. Spread from africa to south america to the usa, international travel warnings. No treatment or vaccine available, illness is usually mild, death is rare. Fungi can live in wider distributions as the climate gets warmer (e. g. valley fever).

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