Lecture 8 epi - Mutualism to disease and epidemiology...

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Unformatted text preview: Mutualism to disease and epidemiology Infectious disease and the tools to fight them Epidemiology Study of factors affecting the illness and health of populations Evidence-based science to identify risk factors for disease and determining optimal treatment approaches to clinical practice Epidemiologists investigate outbreaks, design studies to evaluate possible linkages between factors and health, and develop/apply statistical models to test hypotheses and possible correlations 5 Technology Spreads Diseases Suburban spread into woods Transplants, transfusions Meat- processing techniques n Civilization spread into tropical rain forests n Need for microbiologists Modern technology to detect, prevent diseases Transportation Example E. coli O157:H7 Factors affecting the illness and health in humans As of October 6, 2006, Friday, 199 persons infected with the outbreak strain of E. coli O157:H7 have been reported to CDC from 26 states. Among the ill persons, 102 (51%) were hospitalized and 31 (16%) developed a type of kidney failure called hemolytic-uremic syndrome (HUS). One hundred forty-one (71%) were female and 22 (11%) were children under 5 years old. The proportion of persons who developed HUS was 29% in children (<18 years old), 8% in persons 18 to 59 years old, and 14% in persons 60 years old or older. Among ill persons who provided the date when their illnesses began, 80% became ill between August 19 and September 5. The peak time when illnesses began was August 30 to September 1 -- 31% of persons with the outbreak strain became ill on one of those 3 days....
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Lecture 8 epi - Mutualism to disease and epidemiology...

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