NR 503 Week 4 Midterm Chapter Questions
NR 503: Population Health, Epidemiology & Statistical
Principles
, Endemic means that a disease:
A. Occurs clearly in excess of normal expectancy
B. Is habitually present in human populations
C. Affects a large number of countries simultaneously
D. Exhibits a seasonal pattern
E. Is prevalent among animals
Table who ate egg salad & who did not eat egg salad
Total number of persons who ate each specified combination of food items
Ate tuna Did not eat tuna
Ate egg salad 75 100
Did not eat egg salad 200 50
Total number of persons who ate each specified combination of food items & who later became sick (with acute sore
throats)
Ate tuna Did not eat tuna
Ate egg salad 60 75
Did not eat egg salad 70 15
What is the sore throat attack rate in persons who ate both egg salad & tuna
a. 60/75
b. 70/200
c. 60/133
d. 60/275
e. None of the above
According to the results shown in the preceding tables, which of the following food items (or combination of food
items) is most likely to be infective?
a. Tuna only
b. Egg salad only
c. Neither tuna nor egg salad
d. Both tuna & egg salad
e. Cannot be calculated from the data
In the study of an outbreak of an infectious disease, plotting an epidemic curve is useful because:
a. It helps to determine what type of an outbreak (e.g. single-source, person-to-person) has occurred
b. It shows whether herd immunity has occurred
c. It helps to determine the median incubation period
d. A&c
e. A,b, & c
Which of the following is characteristic of a single-exposure, common-vehicle outbreak?
NR 503: Population Health, Epidemiology & Statistical
Principles
, Endemic means that a disease:
A. Occurs clearly in excess of normal expectancy
B. Is habitually present in human populations
C. Affects a large number of countries simultaneously
D. Exhibits a seasonal pattern
E. Is prevalent among animals
Table who ate egg salad & who did not eat egg salad
Total number of persons who ate each specified combination of food items
Ate tuna Did not eat tuna
Ate egg salad 75 100
Did not eat egg salad 200 50
Total number of persons who ate each specified combination of food items & who later became sick (with acute sore
throats)
Ate tuna Did not eat tuna
Ate egg salad 60 75
Did not eat egg salad 70 15
What is the sore throat attack rate in persons who ate both egg salad & tuna
a. 60/75
b. 70/200
c. 60/133
d. 60/275
e. None of the above
According to the results shown in the preceding tables, which of the following food items (or combination of food
items) is most likely to be infective?
a. Tuna only
b. Egg salad only
c. Neither tuna nor egg salad
d. Both tuna & egg salad
e. Cannot be calculated from the data
In the study of an outbreak of an infectious disease, plotting an epidemic curve is useful because:
a. It helps to determine what type of an outbreak (e.g. single-source, person-to-person) has occurred
b. It shows whether herd immunity has occurred
c. It helps to determine the median incubation period
d. A&c
e. A,b, & c
Which of the following is characteristic of a single-exposure, common-vehicle outbreak?
