Final answer:
A person (or animal) who allows the lodging of an infectious disease agent naturally is called the 'Host' in the epidemiologic triangle. This means they are the living being where the infectious agent multipplies or grows. The agent is the entity causing the disease and the environment is the conditions that aid in transmission.
Step-by-step explanation:
In the context of the epidemiologic triangle, a person (or animal) who permits lodgment of an infectious disease agent under natural conditions is referred to as the Host. This refers to the living organism in which the infectious agent multiplies or develops. In the course of the infectious disease process, this can include humans, animals, and even plants, depending on the specific disease agent. The other two angles of the triangle, the Agent and the Environment, pertain to the entity that causes the disease and the surrounding conditions that help transmission occur, respectively.
An example of a host could be a person who has contracted a bacterial disease from contaminated food or water sources. After exposure, the bacteria invade and often harm the host by causing illness symptomatically. Similarly, some diseases may have animal hosts; for instance, birds are a primary host for the West Nile Virus and can transmit the virus to humans through mosquito vectors.
Learn more about Epidemiologic Triangle