Multiple Choice
In the chain of infection model, which sequence of events correctly describes how an infection occurs?
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25. Epidemiology
Introduction to Chain of Infection
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In the chain of infection (infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host), which link do standard precautions primarily break?
A
Mode of transmission
B
Susceptible host
C
Reservoir
D
Portal of exit
Verified step by step guidance1
Understand the chain of infection, which consists of six links: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
Recognize that standard precautions are infection control practices designed to prevent the spread of pathogens from one person to another.
Identify that standard precautions include hand hygiene, use of personal protective equipment (PPE), respiratory hygiene, and safe injection practices.
Analyze how these precautions interrupt the chain by preventing the transfer of infectious agents from the reservoir or portal of exit to the susceptible host.
Conclude that standard precautions primarily break the 'mode of transmission' link by blocking the ways pathogens move between hosts.
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