Terms Flashcards
Person or animal that harbors the infectious agent/disease and can transmit it to others but does not demonstrate signs of the disease
Carrier
Exposure to a source of infection; a person who has been exposed.
This does not imply infection, but rather the possibility of infection
Contact
Capable of being transmitted fro person to person by contact or proximity. Does not utilize a vector
Contagious
An organism that harbors a parasitic, mutualistic, or commensalism guest.
Host
An organism that lives on or in a host organism and gets its food from or at the expense of its host.
Parasite
Three main classes of human parasites?
Protozoa, helminths, and ectoparasites
An infectious agent or organism that can produce disease
pathogen
Invasion of the body tissues of a host by an infectious agent, regardless if it causes disease or not
Infection
A pathway into the host that gives an agent access to tissue that will allow it to multiply or act
Portal of entry
A population of organisms or the specific environment in which an infectious pathogen naturally lives and reproduces; usually a living host of a certain species
Reservoir
A pathogen that is transmissible from non-human animals (typically vertebrates) to humans
Zoonosis
An increase, often sudden, in the number of cases of a disease above what is normally expected in that population and area
Epidemic
Carries the same definition of epidemic but is often more limited in geographic area
Outbreak
The constant presence of an agent or health condition within a given geographic area or population
endemic
An epidemic occurring over a widespread area (multiple countries or continents) and usually affecting a substantial proportion of the population
Pandemic