Tutorial Activity 1

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Published on 27 May 2011
Health Studies
Disease Ecology True/False Tutorial Activity C
1. Zoonotic infections are infections that originate in animals and can be transmitted to humans. (True)
2. An increase in parasite mortality will increase disease transmission. (False)
3. Some factors that influence the ability of epidemiologists to project the course of future epidemics
are: the critical rate of infection to allow for the disease to spread and sociological changes. (True)
4. A type III epidemic is also called a pandemic, due to it becoming widespread or worldwide. (False)
5. The agricultural revolution resulted in larger concentrations of communities; however the potential for
person-to-person “civilized” infectious disease such as measles, inf luenza and small pox did not
establi sh themselves. (False)
6. The spread of SARS from Hong Kong to Canada is an example of a technological advancement that
speeds disease control. (False)
7. In early sett lements, the farming and domestication of animals and crop plants lead to more parasite
resistant strains of both which helped to promote population growth. (False)
8. An endemic disease outbreak is the occur rence of a disease that is in excess of normal expectancy.
9. The 1976 outbreak of Legionnaires disease is an example of direct transmission of disease. (False)
10. Typhoid Mary” was an example of a symptomatic car r ier of typhoid. (False)
11. Effects of epidemic disease are not limited to the loss of human life, but may include spiritual decline
or economic exploitation. (True)
12. McNeill asserted that all parasites will continue to evolve to combat countermeasures to reduce their
spread until they ultimately kill all hosts available. (False)
13. Direct transmission of disease occurs between an infected person to an uninfected person. (True)
14. Animal domestication and the use of animals in aiding the planting of crops, contributed to the
spread of mosquito vector based diseases such as malaria. (True)
15. Fewer births or more virulent parasites are examples of self regulating factors that limited population
growth. (True)
16. R
value is inf luenced by the length of time a person is infectious and the change in size of a
population. (True)
17. The three factors that are required for a parasite to spread from host to host: there must be a supply of
infected individuals, there must be a supply of individuals who are susceptible to infection, and there
must be a vector of transmission between the two. (True)
18. The portal of entry of disease during respirati on is called aspiration. (False)
19. The three surges of human popul ation corresponded to the following revolutions: tool-making,
agricultural, and scientific-industrial. (True)
20. When a group has acquired resistance to a disease attack due to immunity, this is called herd
immunity. (True)
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