Nursing Acceleration Challenge Exam (NACE) PN-RN Practice Test

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In the chain of infection, what is the source of microorganisms referred to as?

Etiologic agent.
Reservoir.
Vector.
Vehicle.

The correct answer is: Reservoir.

The source of microorganisms in the chain of infection is referred to as the reservoir. This term represents the natural habitat or environment in which pathogens live and multiply. Reservoirs can include humans, animals, and the environment, as they provide the necessary conditions for microorganisms to thrive. Understanding the concept of a reservoir is crucial in infection control and prevention because identifying and managing these sources can help break the chain of infection and reduce the spread of disease. The other terms mentioned serve different roles in the chain of infection. The etiologic agent refers to the specific pathogen causing the disease, a vector is an organism that transmits the pathogen from one host to another (such as mosquitoes transmitting malaria), and a vehicle refers to any inanimate object or substance that may carry and transmit pathogens (like contaminated food or water).