Multiple Choice
In the chain of infection, what is meant by the susceptible host?
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25. Epidemiology
Introduction to Chain of Infection
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In the chain of infection, what term describes the method by which a pathogen leaves its host?
A
Portal of exit
B
Portal of entry
C
Susceptible host
D
Mode of transmission
Verified step by step guidance1
Understand that the chain of infection consists of several key components: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
Identify that the question asks specifically about the method by which a pathogen leaves its host, which refers to the step after the pathogen has multiplied in the reservoir (host).
Recall that the 'portal of exit' is the term used to describe the route or method through which a pathogen exits the host to spread to others.
Differentiate 'portal of exit' from other terms: 'portal of entry' is how the pathogen enters a new host, 'mode of transmission' is how the pathogen moves between hosts, and 'susceptible host' is the individual who can be infected.
Conclude that the correct term describing the method by which a pathogen leaves its host is 'portal of exit'.
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