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Canada (161,583)
HLTB21H3 (177)
Chapter 2

Health Studies, chapter 2 and 3

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Health Studies
Caroline Barakat

Chapter 2Plagues the Price of Being Sedentary Africa was the cradle of humanity Our oldest ancestors lived in Africa 42 million years ago and are named Australopithecus anamnesis2518 million years ago they found a species homo habilis handy man This name is given because altered stones and animal remains where found with the fossilsHhabilis has zoonotic infections which means that parasites were acquired from the wild animals that they killed and huntedHhabilis might have suffered viral diseases such as mosquito transmitted yellow fever hepatitis herpes colds They probably did not have typhus mumps measles influenza tuberculosis cholera chicken pox diphtheria or gonorrhea 16 million years ago Hhabilis was replaced by Homo erectus erect man who was closer to modern humans in body size and had a brain bigger than Habilis but with half the capacity of modern humansMalthusian model suggests that uncontrolled population growth would lead to war diseaseand starvation this act as natural restrains on population growth3 stages of the human moving population upward1 Toolmaking revolution2 Agricultural revolution3 Scientific industrial revolution Agricultural revolution humans going from huntergatherers to farmers domesticated plans and animals and exerted control over productionPattern an impact on disease depends on population density quality of food water and shelter frequency of contact amongst individuals human contact with animals climate People infected with intestinal parasites can transmit the disease to others through their feces and when water supply becomes contaminated either through the use of night soil or the use of fecescontaminated streams the spread of disease can be greatIrrigation Favorable environment for parasites moisture was abundant and there was a liquid medium in which parasites andor their cysts and eggs could persist Once disease is widespread n an agricultural community it can produce a lacking energy and harmed peasantry that is handicapped for sustaining work in the fields digging irrigation canals resisting military attack or throwing off alien political domination and all of this can lead to economic mistreatment Domesticated animals caused diseases to humans since animals left bones feces and garbage which serve as breeding counts for macro parasites It also attracted insects wild birds and rodents that carried their own parasitesNumber of disease acquired from domestic parasites dogs65 cattle45 goat and sheep46 pigs 42 horse35 rats32 poultry26 HIV was a chimpanzee virus that became humanized Monkey pox are transmitted to humans by the bite of pet prarie dogs SARS originated in civet catsMosquitoes and flies sucked human blood and where vectors for malaria yellow fever and African sleeping sickness
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