Demographic Transition Model PDF

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Notes about the demographic transition model...

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Demographic Transition Model Notes Unit 3 Demographic Transition Stage 1: - Low Growth. - For large amount of time. - Population remained about the same. The birth and death rates were high. - Half million people in the world. - Agriculture Revolution (8000BC) – population begin to several thousands/year. Demographic Transition Stage 2: - High Growth (Birth rate remains high, while death rates drops). - 1750 A.D. – population grows 10 times faster than before. - Industrial Revolution - Medical Revolution (late 20th century). Demographic Transition Stage 3: - Moderate Growth. - Birth Rate Drops. - Gap between birth rate and death rate narrows. Demographic Transition Stage 4: - Low growth - Zero population growth (Birth rates go down when something happens to a specific group. Such as women delaying giving birth, not wanting to give birth, and women working). Demographic Transition Stage 5: - Population decline. - Marrying later in life or not marrying. (Social norm that you have children when you are married, and if you are not married you won’t have kids). - One or no children. Epidemiologic Transition Model –looks at the causes of death at each stage of the demographic transition. Epidemiologic Transition Stage 1: - Stage of Pestilence and Famine. - The Black Plague. - People dying at very high rate.

Epidemiologic Transition Stage 2: - The stage of receding pandemics.

- Pandemic—disease that occurs over a wide geographic area and affects a high proportion of the population - Death rate decreases dramatically. - Improved sanitation, nutrition, medicine with Industrial Revolution. Epidemiologic Transition Stage 3: - The stage of degenerative and human created diseases (cancer and cardiovascular disease). - Sharp declines in polio, measles, diphtheria (because of medicine, immunizations). Epidemiologic Transition Stage 4: - The stage of delayed degenerative diseases. - Cardiovascular and cancers still around - Life expectancy extended through surgeries, med’s, nutrition, and exercise. Epidemiologic Transition Stage 5: - The stage of reemergence of infectious and parasitic diseases. - Old diseases coming back onto the scene. (Virus develop resistance to immunizations). - Microbes are developing resistance. - Malaria return (because some countries are not finically capable of stopping it). - Tuberculosis. -H5N1 - Avian Flu – 2006: 258 cases, 154 died. - 1918-19 Influenza Pandemic. - “Spanish Flu” 20-40 million deaths, more deaths than WWI. - AIDS. - Factors: - Disease Microbes adapting becoming resistant. - Poverty. - Travel. - What is different about AIDS?...