Multiple Choice
SARS-CoV-2 virus (Covid-19) is a very contagious virus and most individuals infected by the virus show symptoms. However, some people infected with the disease do not show symptoms at all. These people are:
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25. Epidemiology
Reservoirs of Infection
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In the context of reservoirs of infection, which term best describes "a source that allows the pathogen to survive and multiply"?
A
Portal of entry
B
Reservoir
C
Vector
D
Fomite
Verified step by step guidance1
Understand the definition of each term related to reservoirs of infection: 'Portal of entry' refers to the site through which a pathogen enters the host; 'Vector' is a living organism that transmits a pathogen; 'Fomite' is an inanimate object that can carry pathogens but does not allow them to multiply; 'Reservoir' is a source where the pathogen can survive and multiply.
Focus on the key phrase in the question: 'a source that allows the pathogen to survive and multiply.' This implies the pathogen not only persists but also increases in number.
Eliminate options that do not fit this criterion: 'Portal of entry' is about entry, not survival or multiplication; 'Vector' transmits but may or may not allow multiplication; 'Fomite' only carries pathogens without supporting their growth.
Recognize that a 'Reservoir' is the natural habitat of the pathogen where it can live, survive, and multiply, making it the best fit for the description.
Conclude that the term 'Reservoir' best describes a source that allows the pathogen to survive and multiply.
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