Epidemiology — UPSC CMS MCQs (Preventive & Social Medicine)

Question 1

Which one among the following is best defined as the interval of time between receipt of infection by a host and maximal infectivity of that host?

Accepted Answer

A. Generation time

Answer

Latent period

Answer

Incubation period

Answer

Serial interval

Question 2

Which one of the following best explains the relationship among Prevalence (P), Incidence (I) and Duration (D) of a disease given the assumption that the population is stable?

Accepted Answer

D. P = I × D

Answer

I = P × D

Answer

D = P × I

Answer

I = P + D

Question 3

Which of the following are correct in respect of incidence rate?
1. It is a sum total of new and old cases.
2. It refers to a specified period of time.
3. It refers to a defined population.
4. It must include the unit of time in final expression.
Select the correct answer using the code:

Accepted Answer

A. 2, 3 and 4

Answer

1, 2 and 3

Answer

1, 2 and 4

Answer

1, 3 and 4

Question 4

Which of the following statements are correct for incidence rate?
1. It is useful for taking action to control a disease.
2. Rising incidence rates may indicate ineffectiveness of the current control programmes.
3. Fluctuation in incidence rate may indicate a change in aetiology of disease. Select the answer
using the code given below.

Accepted Answer

D. 1, 2 and 3

Answer

1 and 2 only

Answer

2 and 3 only

Answer

1 and 3 only

Question 5

Consider the following definition: “A high level of infection beginning early in life and affecting most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than the children.” Which one of the following terms best fits this definition?

Accepted Answer

A. Holoendemic

Answer

Hyperendemic

Answer

Hypoendemic

Answer

Pandemic

Question 6

Which one of the following terms is an “all-or-none phenomenon” and is best described as termination of all transmission of infection by extermination of the infectious agent?

Accepted Answer

C. Disease eradication

Answer

Disease control

Answer

Disease elimination

Answer

Disease surveillance

Question 7

John Snow’s discovery that cholera is a waterborne disease was the outcome of which type of study?

Accepted Answer

B. Natural experiment

Answer

Uncontrolled trial

Answer

Risk factor trial

Answer

Trial of aetiological agent

Question 8

Which one among the following is best defined as the interval of time between receipt of infection by a host and maximal infectivity of that host?

Accepted Answer

A. Generation time

Answer

Latent period

Answer

Incubation period

Answer

Serial interval

Question 9

In which one of the following study designs, the unit of study involves populations rather than individuals?

Accepted Answer

A. Ecological studies

Answer

Cross-sectional studies

Answer

Case-control studies

Answer

Cohort studies

Question 10

In a town, a study was carried out to determine the role of cigarette smoking in the causation of lung cancer. It was found that a total of 7000 people in the town were smokers. Of them, 70 developed lung cancer. In the same town, 3000 people were non-smokers. Of them, 3 developed lung cancer. Given these numbers, what would be the attributable risk to cigarette smoking for lung cancer?

Accepted Answer

D. 90%

Answer

10%

Answer

30%

Answer

60%

Question 11

Under the International Health Regulations which of the following diseases are notifiable by the National Health Authority to the World Health Organization?
1. Cholera
2. Plague
3. Klebsiella pneumonia
4. Yellow fever
Select the correct answer using the code below:

Accepted Answer

B. 1, 2 and 4

Answer

1, 2 and 3

Answer

1, 3 and 4

Answer

2, 3 and 4

Q1. Which one among the following is best defined as the interval of time between receipt of infection by a host and maximal infectivity of that host?

Q2. Which one of the following best explains the relationship among Prevalence (P), Incidence (I) and Duration (D) of a disease given the assumption that the population is stable?

Q3. Which of the following are correct in respect of incidence rate? 1. It is a sum total of new and old cases. 2. It refers to a specified period of time. 3. It refers to a defined population. 4. It must include the unit of time in final expression. Select the correct answer using the code:

Q6. Which one of the following terms is an “all-or-none phenomenon” and is best described as termination of all transmission of infection by extermination of the infectious agent?

Q7. John Snow’s discovery that cholera is a waterborne disease was the outcome of which type of study?

Q8. Which one among the following is best defined as the interval of time between receipt of infection by a host and maximal infectivity of that host?

Q9. In which one of the following study designs, the unit of study involves populations rather than individuals?

Q11. Under the International Health Regulations which of the following diseases are notifiable by the National Health Authority to the World Health Organization? 1. Cholera 2. Plague 3. Klebsiella pneumonia 4. Yellow fever Select the correct answer using the code below: