Understanding Disease Part 2 - Understanding Disease Part 2

Understanding Disease Part 2 - Understanding Disease Part 2...

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Unformatted text preview: Viewing Health From A Global Perspective Understanding Disease Part II Microorganisms and people have lived together for centuries and have evolved ways that allows both to survive. Why dont infections completely wipe out host populations? A. They would eliminate the host B. A certain number of host organisms are immune C. After a sufficient number of hosts organisms are killed they become less difficult D. All of the above After the discovery of antibiotics (magic bullets) many believed we had conquered infectious disease. Were they right? A. Yes B. No C. May be D. Eventually Microparisites and Human Populations As the human population grows toward ten billion people, are we at risk of massive pandemics of disease? How might these occur? What is herd immunity? A. The animals that people interact with do not have disease B. A sufficient number of organisms in a group are immune so that epidemics are unlikely C. Every individual in the group already has had the disease D. Refers to the absence of sexually transmitted disease Plagues and Peoples: The Life Cycle of Malaria Approximately 3,500 species of mosquitoes grouped into 41 genera. Human malaria is transmitted only by females of the genus Anopheles . Of the approximately 430 Anopheles species, only 30-40 transmit malaria (i.e., are "vectors otherwise known as agents) Source: CDC, 2004; http://www.cdc.gov/malaria/impact/index.htm#geography Whos at Risk?...
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Understanding Disease Part 2 - Understanding Disease Part 2...

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