1. The population of a city on February 15, 2005, was 36,600. The city has a
passive surveillance system that collects hospital & private physician
... [Show More] reports of
influenza cases every month. During the period between January 1 & April 1,
2005, 2,200 new cases of influenza occurred in the city. Of these cases, 775
persons were ill with influenza according to surveillance reports on April 1, 2005.
The prevalence rate of active influenza as of April 1, 2005, was:
- 20 per 1,000 population
2. What would be the effect on age-specific incidence rates of uterine cancer if
women with hysterectomies were excluded from the denominator of incidence
calculations assuming that most women who have had hysterectomies are older
than 50 years of age?
- Rates would increase in women older than 50 years of age but may decrease in
younger women as they get older.
3. The ability of a single person to remain free of clinical illness following exposure
to an infectious agent is known as:
- Immunity
4. Which of the following reasons can explain why a person who did not consume
the infective food item got sick?
- All of the above
5. Which of the food items (or combination of items) is most likely to be the infective
item(s)?
- Ice cream only
6. The case-fatality rate associated with plague is lowest in which community?
- Community C
7. The incidence & prevalence rates of a chronic childhood illness for a specific
community are given below.
- The duration of disease is becoming longer
8. The following table gives the mean annual age-specific mortality rates from
measles during the first 25 years of life in successive 5-year periods. You may
assume that the population is in a steady state (i.e., migrations out are equal to
migrations in). Based on the information above, one may conclude:
- Children ages 5 to 9 had the highest rate of death in all periods
9. . In a country with a population of 16 million people, 175,000 deaths occurred
during the year ending December 31, 2005. These included 45,000 deaths from
tuberculosis (TB) in 135,000 persons who were sick with TB. Assume that thepopulation remained constant throughout the year. Not all 135,000 cases of TB
were contracted during 2005. Which of the following statements is true?
- None of the above
10.In 2001, a state enacted a law that required the use of safety seats for all
children under 7 years of age & m&atory seatbelt use for all persons. The table
above lists the number of deaths due to motor vehicle accidents (MVAs) & the
total population by age in 2000 (before the law) & in 2005 (4 years after the law
was enacted).
- Correct, because both the total & the age-adjusted mortality rates are higher in
2005 than in 2000
11.Which of the following is an advantage of active surveillance?
- More accurate due to reduced reporting burden for health care providers
12.A disease has an incidence of 10 per 1,000 persons per year, & 80% of those
affected will die within 1 year. Prior to the year 2000, only 50% of cases of the
disease were detected by physician diagnosis prior to death. In the year 2000, a
lab test was developed that identified 90% of cases an average of 6 months prior
to symptom onset; however, the prognosis did not improve after diagnosis.
Which statement is true concerning the duration of the disease after the
development of the lab test?
- Mean duration of a case of the disease is longer in 2000
13.What is the overall attack rate in persons who did not eat ice cream?
- 33%
14.The table above describes the number of illnesses & deaths caused by plague in
four communities. The proportionate mortality ratio associated with plague is
lowest in which community?
- Community D
15.Which of the following is characteristic of a single-exposure, common-vehicle
outbreak?
- The epidemic curve has a normal distribution when plotted against the
logarithm of time [Show Less]