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MBI 361 Test 1 questions with complete solutions
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MBI 361 Test 1 questions with complete solutions
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MBI 361 Test 1 questions with completesolutions
Endemic means that a disease: - correct answer ✔✔Is habitually present in human populations
In the study of an outbreak of an infectious disease, plotting an epidemic curve is useful because: -
correct answer ✔✔It helps to determine what type of outbreak (e.g., single-source, person-to-person)
has occurred and It helps to determine the median incubation period
Which is characteristic of a single-exposure, common-vehicle outbreak? - correct answer ✔✔explosive
Which recent widespread disease is considered pandemic? - correct answer ✔✔H1N1 flu virus (swine
flu)
At an initial examination in Oxford, Massachusetts, migraine headache was found in 5 of 1,000 men aged
30 to 35 years and in 10 of 1,000 women aged 30 to 35 years. The inference that women have a two
times greater risk of developing migraine headache than do men in this age group is: - correct answer
✔✔Incorrect, because of failure to distinguish between incidence and prevalence
A prevalence survey conducted from January 1 through December 31, 2012, identified 1,000 cases of
schizophrenia in a city of 2 million persons. The incidence rate of schizophrenia in this population is
5/100,000 persons each year. What percentage of the 1,000 cases were newly diagnosed in 2012? ____ -
correct answer ✔✔10%
Which of the following is an advantage of active surveillance? - correct answer ✔✔More accurate due to
reduced reporting burden for health care providers
What would be the effect on age-specific incidence rates of uterine cancer if women with
hysterectomies were excluded from the denominator of the calculations, assuming that there are some
women in each age group who have had hysterectomies? - correct answer ✔✔The rates would tend to
increase
Population of the city of Atlantis on March 30, 2012 = 183,000
, No. of new active cases of TB occurring between January 1 and June 30, 2012 = 26
No. of active TB cases according to the city register on June 30, 2012 = 264
The incidence rate of active cases of TB for the 6-month period was: - correct answer ✔✔14 per 100,000
population
Population of the city of Atlantis on March 30, 2012 = 183,000
No. of new active cases of TB occurring between January 1 and June 30, 2012 = 26
No. of active TB cases according to the city register on June 30, 2012 = 264
The prevalence rate of active TB as of June 30, 2012, was: - correct answer ✔✔144 per 100,000
population
Disease X has a duration of 15 years and a low incidence (5 per 100,000 person-years). Disease Y has a
duration of 5 years and a low incidence (5 per 100,000 person-years). Comparing Disease X to Y in the
same population, we would expect Disease X to have a: - correct answer ✔✔Higher prevalence
The following health statistics are available on the Internet for country Z about two disease outcomes.
Disease A has an annual incidence of 225 per 100,000 population and an annual mortality rate of 150
per 100,000. Disease B has an annual incidence of 500 per 100,000 population and the same annual
mortality rate as disease A. Neither disease A or B has a cure. What would you conclude regarding the
burden of these diseases in country Z? - correct answer ✔✔Disease B has a higher prevalence than
disease A
Chikungunya virus infection was recently introduced into the Dominican Republic. During the first year
after introduction, the virus has infected a total of 251,880 people in the Dominican Republic, which has
a population size of 10.4 million people. Infection by the chikungunya virus is rarely fatal. Which of the
following is correct? - correct answer ✔✔The 1-year cumulative incidence of chikungunya is 24.2 per
1,000 persons
What Is Epidemiology? - correct answer ✔✔the study of how disease is distributed in populations and
the factors that influence or determine this distribution OR
the study of the distribution and determinants of health-related states or events in specified populations
and the application of this study to control of health problems.
What is etiology - correct answer ✔✔cause of disease
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