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In the chain of infection, which component refers to the route that allows the pathogen to enter the host?
A
Mode of transmission
B
Portal of exit
C
Reservoir
D
Portal of entry
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1
Understand the chain of infection, which consists of several components: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
Identify that the 'portal of exit' is the route through which the pathogen leaves the reservoir or infected host.
Recognize that the 'mode of transmission' describes how the pathogen moves from one host or reservoir to another (e.g., direct contact, airborne, vector-borne).
Know that the 'reservoir' is the natural habitat where the pathogen normally lives and multiplies.
Conclude that the 'portal of entry' is the specific route or site through which the pathogen enters a new host, such as mucous membranes, skin breaks, or respiratory tract.