Epidemiology Practice Questions

True or false?: Disease is a random event

False

Which of the following is an example of a disease that can be explained with a deterministic model?:

A) Rabies

B) Cardiovascular disease

C) Hepatic cirrhosis

D) Lung cancer

A

Which of the following diseases is best explained with a multifactorial model?

A) Osteoarthritis

B) Rabies

C) Anthrax

D) Salmonellosis

A

Which stage of an infectious disease poses the greatest risk to the susceptible members of the population?

A) Stage of susceptibility

B) Stage of subclinical disease

C) Stage of clinical disease

D) Stage of recovery, disability, or death

B

Development of an effective infectious disease control program requires knowledge of which of the following?

A) Causes of the disease

B) Impact of the disease

C) Natural course of the disease

D) All of the above

D

In the hierarchy of validity represented by the scientific method, which of the following pairings is correct?

A) Ideas and opinions are more powerful than meta-analysis.

B) Case-control studies are more powerful than cohort studies.

C) Cohort studies are more powerful than cross-sectional studies.

D) Randomized clinical trials are more powerful than meta-analysis.

C

Which study design is used for determining the prevalence of disease?

A) Cross-sectional

B) Case-control

C) Cohort

D) Clinical trial

A

What are the two study designs used for outbreak investigations? (Multiple are correct.)

A) Cross-sectional

B) Case-control

C) Cohort

D) Clinical trial

B, C

In which study design does the investigator control exposure?

A) Cross-sectional

B) Case-control

C) Cohort

D) Clinical trial

D

Which of the following study designs can establish that exposure preceded the outcome of interest?

A) Cross-sectional

B) Case-control

C) Cohort

D) Clinical trial

C

Which of the following are intrinsic host factors for disease?:

A) Age

B) Physiological status

C) Prior exposure

D) Breed

E) Co-infection

F) All of the above

F

Which of the following are examples of extrinsic host factors for disease?

A) Service dog

B) Air exchange rate in a swine barn

C) Moldy hay

D) Pregnancy status

A, B, C

Which of the following statements about herd immunity is true?

A) Continuous introduction of naive individuals is necessary to achieve herd immunity.

B) Herd immunity assumes random mixing of the population.

C) As R₀ increases, the immunization rate required for herd immunity decreases.

D) Herd immunity is primarily determined by the frequency of contacts among susceptible animals.

B

Which of the following are indicators of the infectiousness of an agent?

A) Secondary attack rate

B) Basic reproduction number

C) Case fatality rate

D) Prevalence rate

A, B

Which of the following was the first infectious disease proven to be transmitted by an arthropod vector?

A) Anthrax

B) Babesiosis

C) Cholera

D) Malaria

E) Zika virus disease

B

True or false?:

Agents that are not able to persist outside of a host are often transmitted by direct transmission.

True

True or false?:

Expiratory droplets are ten times more infectious than droplet nuclei.

False

True or false?:

Droplet nuclei can transmit disease over large distances.

True

True or false?:

In a population, vaccination only prevents disease in those who receive the vaccine.

False

True or false?:

Effective disease control measures can only be implemented when the etiologic agent is known.

False

Which do you expect to have the narrowest (relative) confidence interval?:

A) Multiple masses observed in lymphoma in 84 dogs

B) Toleration of carboplatin beads in 29 dogs

C) Outcome of limb fracture repair in 139 rabbits

C