Question 1

Which of the following best describes the 'chain of infection'?

Accepted Answer

A process by which an infectious agent/pathogen can pass (transmit) from one host to another.

Question 2

Which of the following is NOT a required component for the transmission of infection?

Accepted Answer

The reservoir must be symptomatic.

Question 3

In the chain of infection, which link is directly responsible for allowing the infectious agent to leave the reservoir?

Accepted Answer

Portal of exit

Question 4

A person sneezes into their hand and then touches a doorknob. Another person touches the same doorknob and later rubs their eyes, becoming ill. Which link in the chain of infection does the doorknob represent?

Accepted Answer

Mode of transmission

Question 5

Which of the following is an example of a portal of entry in the chain of infection?

Accepted Answer

A cut in the skin

Question 6

If a nurse wears gloves while treating a patient, which link in the chain of infection is being interrupted?

Accepted Answer

Mode of transmission

Question 7

Which of the following best describes a 'reservoir' in the chain of infection?

Accepted Answer

A place where the infectious agent lives and multiplies

Question 8

A hospital implements strict handwashing protocols to prevent the spread of infection. Which link in the chain of infection is primarily targeted by this intervention?

Accepted Answer

Mode of transmission

Question 9

Which of the following is a correct sequence of the chain of infection?

Accepted Answer

Infectious agent → Reservoir → Portal of exit → Mode of transmission → Portal of entry → Susceptible host

Question 10

A person with a cold virus sneezes, releasing droplets into the air. What is the 'portal of exit' in this scenario?

Accepted Answer

The respiratory tract

Question 11

Which of the following actions would most effectively break the chain of infection at the 'susceptible host' link?

Accepted Answer

Receiving a vaccination

Question 12

If a pathogen is unable to find a suitable portal of entry, what will most likely happen?

Accepted Answer

Infection will not occur

Question 13

Which of the following is an example of breaking the chain of infection at the 'reservoir' link?

Accepted Answer

Properly treating and isolating infected individuals

Question 14

A food handler with hepatitis A fails to wash their hands after using the restroom and then prepares food. Which link in the chain of infection is most directly responsible for the spread of the virus in this scenario?

Accepted Answer

Mode of transmission

Question 15

Which of the following best illustrates a 'mode of transmission' in the chain of infection?

Accepted Answer

Touching a contaminated surface and then touching your face

Protecting Against Infectious Diseases: The Chain of Infection

Study Guide - Practice Questions

Study Guide - Flashcards