Unit 1: Disease
Has A Changing Ecology
Answers to Activities |
| Activity 1.1 How's Your Health? |
Students can provide many answers and reasons for the first two questions.
The point of the questions is that people's perceptions of health and disease
are different. Prompt students to explain why they do not feel at risk
from some afflictions, yet are concerned about others. Ask them to consider
not only infectious diseases, but also chronic disease, such as heart disease.
Students should also consider nutritional deficiencies as causes of disease;
psychosocial stress, bioclimatology, and environmental contamination as
risks or stresses that may can affect their health; genetic susceptibility
as a factor in disease development; and access to health services as a
factor in health status. Examples of each of these are provided in the
module text.
This activity also provides an opportunity for you to bring geography
into the discussion. Many students will likely feel that they are not at
risk to some health problems due to their location. Students in the United
States may not feel at risk from dengue fever, but may mention heart attacks
or cancer. You can broaden their concept of risk by suggesting its changing
nature in light of global environmental changes (i.e., the shrinking space-time
continuum, with airline travel speeding up the diffusion of disease and
changing the areas in which a disease could be introduced). Dengue has
occurred in the US -- on wagon trains heading west it was called "breakbone
fever" -- and there is now an increased likelihood of dengue epidemics
because it is again spreading in the Caribbean and because the Asian mosquito,
Aedes albopictus, has been introduced and is spreading in the US
(it survives cold better than other species and bites animals as well as
people, so it can spread infection between them).
Concerning health responsibility, when students begin this exercise
they are likely to think that they alone are responsible for their health.
The discussion and the questions should help students begin to see the
complexity of health and to realize that everyone cannot be responsible
for her or his own health. Students should get a sense of community responsibility
for health.
| Activity 1.2 It Could Happen
to You -- Bringing Health Home |
A variety of responses are possible for the questions posed after each
narrative in this activity. The following answers should be used only as
a guide to assessing students’ responses.
Narrative 1:
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Yes, they are, in relative terms.
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There are many stereotypes of victims of hunger, including that of a homeless
person, an unemployed person, or a starving child from a lesser developed
country. John and Margaret do not fit any of these stereotypes. They have
a home and some form of income.
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Any number of problems could arise from John and Margaret’s nutritional
circumstances. They could be susceptible to diseases like osteoporosis
resulting from vitamin or mineral deficiencies, or they could be at risk
of contracting influenza or pneumonia due to weakened immune systems.
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John and Margaret live in an area that requires them to own an automobile
and therefore they must spend some of their income for maintenance and
insurance for the car. The fact that their daughter is unable to assist
them because she lives in Tulsa illustrates the impact of increased mobility
on the family unit and the health of family members.
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Blame is a difficult and complex notion to assess, and in this case there
are many factors that have produced John and Margaret’s circumstances.
They did not have savings adequate to support themselves during retirement.
They do not have private medical insurance, most likely because John was
self-employed and did not have the benefit of employer-assisted insurance
programs. Social Security has proven to be inadequate to cover their costs
of living, and in fact, the entire program may face bankruptcy early in
the next century without some reforms. John and Margaret also do not have
the "safety net" that has traditionally been provided by one’s children
and extended family. Their daughter lives several hundred miles away and
is unaware of their situation.
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One aspect of global change is the increasing mobility that has allowed
John and Margaret to be separated from their family by several hundred
miles. Another (which may not be global) is the growth of suburbs in the
US where public transportation and other public support facilities may
not be easily accessible.
Narrative 2
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Ann could have contracted TB from a number of locations, including her
office in New York City, her Connecticut suburban community, on an airplane
to vacation locations, in London, in Miami, on her Caribbean Cruise, at
her company health club, or any other place in which she often comes in
contact with people, like the New York subway.
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Ann’s last statement makes it clear that she assumes TB to be a disease
of the poor. She appears to believe that her wealth can keep her immune
to the disease. Her surprise may also be explained by the fact that she
makes an effort to keep herself healthy and fit by working out at the health
club and by taking stress-relieving vacations around the world.
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This question will depend entirely upon the student and may include some
of the same stereotypes that Ann has (see above).
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The key geographic factor is Ann’s global travel, which exposes her to
many different individuals, in many different locations. She also works
and lives in a very densely populated urban location, where she comes in
contact with many people on a daily basis.
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This narrative illustrates the role of increasing mobility in the (re)emergence
of infectious diseases, like tuberculosis.
Narrative 3
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Yes there is a hidden threat at Emilio’s workplace. It could be any number
of things, but the narrative suggests that it may be carpal tunnel syndrome,
a condition often affects the wrists of individuals who use computer terminals
or who perform data entry for much of their workday.
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Emilio may be in decent physical shape, but his mental health is deteriorating.
He has become depressed from his job and his father’s death and has turned
to alcohol.
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Yes. Emilio’s last comment illustrates this notion of immunity. He believes
that since he isn’t doing hard physical labor or anything "dangerous" that
his health may not be at risk.
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Emilio lives in the Midwest, and from the description, we can assume that
he lives in a small town or rural area. Urbanization has resulted in many
job opportunities being relocated to urban areas; therefore, those in rural
areas may find their career options somewhat limited, as Emilio did. Also,
those living in rural areas or small towns may not have access to the bigger
universities often found in larger cities.
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As mentioned above, urbanization has resulted in the loss of job opportunities
in rural areas. To make a living, people often find it necessary to migrate
to the city. Those who do not move may find that the local economy is stagnant
and their career and educational options limited. Emilio and his friends
appear to be experiencing these effects, as they all are described as depressed,
discouraged, living for the day, and abusing alcohol.
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Because he is a part-time or temporary employee, Emilio most likely does
not receive any employer-provided benefits like health insurance.
| Activity 1.3 Disease Diffusion
and Mapping |
Part A:
1. Students should create a table similar to the one shown below.
Note that the ranges they choose for their data classes may vary from this
example.
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Range
|
Frequency
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|
1 - 2.99
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4
|
|
3 - 4.99
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3
|
|
5 - 6.99
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4
|
|
7 - 7.99
|
1
|
2. The categories that students chose will vary. For simplicity,
we have used the same categories as those listed for question #1.
3. Based on the four categories used in #1 and #2, and the color
scheme below, the map would look like the following:
|
|
| KEY: 1 - 2.99 = white; 3 - 4.99 = light gray;
5 - 6.99 = dark gray; 7 - 8.99 = black |
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The area with the highest incidence rates is area G on the eastern part
of the town, bordered by Route 13 to the north and Big Run Creek to the
south. In general terms, Yukilosis is found in all parts of the town, but
the highest rates appear mainly on the eastern part of the town. If different
categories were used, we would see a somewhat different picture. For example,
the one area of highest incidence may have been subsumed under a different
category, thus making the eastern portion more uniform. More detail could
be shown if more categories with smaller ranges were used.