Week 1- What is Causality Anyway? Flashcards
What is infectivity?
Amount of an organism that is required to initiate infection
What is pathogenicity?
The ability of the agent to produce clinical signs in infected hosts (high pathogenicity means increased clinical signs)
What is stability?
Time an organism can remain infective outside the host
What is virulence?
Ability of agent to cause severe disease/death in hosts with clinical signs
What is immunogenicity?
The ability of agent to produce an inflammatory response in host (great for agent, sucks for host). This relates to the competency of the immune system of host
What is antigenic variation?
How quickly can the organism change?
What is shedding?
Becoming infectious, making other people sick
What is a dead-end host?
Cannot transmit agent to another animal, e.g. hydatid cysts
What is a reservoir?
Where the agent normally lives and replicates
What is the incubation period?
Period between infection and development of clinical signs
What is the latent period?
The period between infection and shedding
What is infectiousness?
NOT the same as infectivity (relates more to agent- this relates to the host). The amount of infectious agents that can be transmitted from host
