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The chain of infection describes the situations that lead to acquiring a pathogen. The links are: infectious agent, reservoir, portal of exit from the reservoir, mode of transmission, and portal of entry into a susceptible host.
A pathogen or infectious agent is a biological agent that causes disease or illness to its host.
false
virus
A pathogen is any infectious agent/organism that brings disease when comes in contact with a host.
A host agent is the agent for a host company.
The chain of infection for biological agents begins with the etiological agent and includes the reservoir, the portal of exit, and the mode of transmission. The portal of entry and the susceptible host end the chain.
The six essential factors in the development of the infection process are the infectious agent (pathogen), reservoir (source of pathogen), portal of exit from reservoir, mode of transmission, portal of entry into host, and the susceptible host. These factors work together to allow the pathogen to infect and establish itself in the host, leading to disease.
It is infectious.
A host agent is the agent for a host company.
The virus enters the host cell in the penetration phase.
The epidemiological triangle or epidemiological triad is a model describing the factors involved for an infectious disease. On one of each of the three ends is the host, the agent and the environment:The Host: the living organism which is capable of being infectedThe Agent: the factor that must be present or missing for the disease to occurThe Environment: the extrinsic force(s) or situation affecting the host's opportunity to be exposed to the agent