Question 1

Infectivity is:

Accepted Answer

Infectivity refers to the ability of a pathogen to establish an infection in a host. It is not limited to viruses and is not related to infertility.

Question 2

The incubation period is:

Accepted Answer

The incubation period is defined as the time between exposure to a pathogen and the appearance of the first signs and symptoms of the disease in an individual.

Question 3

Pathogenicity:

Accepted Answer

Pathogenicity is the ability of an organism to cause disease, whereas virulence refers to the degree of harm caused by the organism.

Question 4

Virulence is:

Accepted Answer

Virulence refers to the degree of damage a microorganism can cause to its host, not limited to viral infections or human infections, and is distinct from pathogenicity, which is the ability to cause disease.

Question 5

Consider the following: the common cold and the Ebola virus.
Which is/are pathogenic?

Accepted Answer

The answer of Consider the following: the common cold and...

Question 6

In Question 5, which disease is more virulent?

Accepted Answer

The answer of In Question 5, which disease is more...

Question 7

Which of the following could normally be considered chronic infections? Choose all that apply.

Accepted Answer

AIDS and COPD are both chronic infections. AIDS is caused by the human immunodeficiency virus (HIV), which attacks the body's immune system. COPD is a chronic inflammatory lung disease that causes obstructed airflow.

Question 8

Which one of the following is the best possible definition of sensitivity?

Accepted Answer

The answer of Which one of the following is the...

Question 9

A definition of specificity is:

Accepted Answer

Specificity is the proportion of true negatives correctly identified by a test out of all the actual negatives as determined by the gold standard.

Question 10

Which of the following is true in terms of the number of patients involved?

Accepted Answer

The answer of Which of the following is true in...

Question 11

A latency period is defined as:

Accepted Answer

The answer of A latency period is defined as:
...

Question 12

The incubation period is:

Accepted Answer

The incubation period is the time between exposure to an infection and the appearance of the first symptoms, which aligns with option A. It is not always the same as the latency period, which is the time from infection to infectiousness. Options C and D do not relate to the definition of the incubation period.

Question 13

Prevalence takes into account only new cases in a population during a given period of time.

Accepted Answer

Prevalence accounts for all existing cases (both new and pre-existing) in a population at a specific point in time or over a period, not just new cases.

Question 14

Incidence takes into account only existing cases in a population during a given period of time.

Accepted Answer

Incidence refers to the number of new cases of a disease that occur in a specific population during a defined period of time, not existing cases.

Quiz 2: Basics of Infectious Disease Epidemiology

Infectivity is:

The incubation period is:

Pathogenicity:

Virulence is:

Consider the following: the common cold and the Ebola virus. Which is/are pathogenic?

In Question 5, which disease is more virulent?

Which of the following could normally be considered chronic infections? Choose all that apply.

Which one of the following is the best possible definition of sensitivity?

A definition of specificity is:

Which of the following is true in terms of the number of patients involved?

A latency period is defined as:

The incubation period is:

Prevalence takes into account only new cases in a population during a given period of time.

Incidence takes into account only existing cases in a population during a given period of time.