Topic 7 - Antibiotics.docx

Topic 7 - Antibiotics.docx - Topic 7 Antibiotics...

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Topic 7 Antibiotics Antibiotics One of the greatest inventions Other is vaccine Life Expectancy Then and Now 1900 44 years o Main causes of death: Pneumonia Tuberculosis Influenza o This lasted until 1950s 2004 82 years o Main causes of death: Heart disease Cancer Stroke Data for Canada Life expectancy has doubles in the last 100 years Changes also in quality of life Causes of death have shifted from infectious disease to “wear and tear” Historically people lived entire lives in an unhealthy state o Constantly sick (parasites) This condition still exists in many developing countries 1900: die from some sort of disease Today: life expectancy is greater, not worried about disease but rather our body wears out People used to be afraid of being cut Vaccinations and antibiotics Plagues Were Common Throughout History Plague killed off half population We don’t worry about this stuff anymore No defense during plague because it was not known how it was spread or caused Cures and Treatments Failed During the plague there were plague doctors, not real doctors Treated the sick but not qualified to No idea how disease was passed Their masks had a long tube: thought disease was caused by bad smells, put flowers/spices at end of mask, and nice smell protected you from disease Poke patient with stick and charge money No benefit to patient Cause of Disease Was Unknown
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Curse from God Spontaneous generation Bad smell or unclean conditions (miasma) No treatment because they didn’t know the cause Made up cause to make up cure Thought disease comes from god, spontaneous generation (magically appeared) or location caused disease Bad smell arose from location Picture: attempted to cure plague, red marks are flames, burn local scapegoat population because curse Post Natal Infections – 30% Death Rate 30% of dying for mom from giving birth Women were afraid to give birth Surgery Survival Rate Less Than 30% Even if you survived surgery, most people will die a week later Surgery out in the open during civil war Didn’t clean tools for surgery WW1 and WW2 – More Deaths Due to Infection Than Combat More soldiers died from infection than combat Most died in hospital from secondary infection Agostino Bassi Proved Germ Theory of Disease Disease comes from (150 years ago): microorganisms cause disease Proved germ theory by experimenting on silk worms Certain types of bacteria cause disease in silk worms First time we know where diseases come from John Snow Disproved Miasma Theory 1854 Pioneered science of epidemiology Cause of disease comes from mathematics Map of Cholera Infections Identified the Source He made a map, plotted each case of cholera Black marks mean incidence of disease Diseases cluttered around water pump so water is source of diseases Water Pump is a Historical Landmark
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