Page 32 - ractice Exam Questions and rationales

Beginning with the infectious agent, place the elements in the correct order of the chain of
infection. (Click and drag the options in the left column to their correct order in the right
column).

A. reservoir host

B. portal of exit

C. means of transmission

D. portal of entry

E. susceptible host

Your response:
reservoir host, portal of exit, means of transmission, portal of entry, susceptible host
Correct response:
reservoir host, portal of exit, means of transmission, portal of entry, susceptible host
Rationale: Infectious diseases are spread through a series of steps known as the “chain of
infection". For an infection to occur and spread, each of the six links of the chain must take
place. Removing any link in the chain will stop the cycle. Therefore, identifying and instituting
appropriate actions at different steps in the cycle will halt the spread of the infection. The chain
begins with the infectious agent (bacteria, virus,etc.) and spreads to a reservoir (place to live,
like an animal, insect, water, etc.). The portal of exit is a way for the microorganism to leave the
reservoir (in a cough, feces, etc.) to transmit the disease. The mode of infection refers to how
infectious diseases are spread: by contact, by vehicle, by vector, and by inhalation. The
infectious agent enters a susceptible host through a portal of entry.
Placement of the ground lead on an ECG is on the

A. RL on the muscular portion of the leg.