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Infectious diseases
terms related to disease
14
Other
10th Grade
03/11/2011

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Term
Pathogen
Definition
a disease producing agent
Term
re-emerging
Definition
Once occurred, greatly declined, then increase in incidence.
Term
contagious
Definition
easily spread
Term
Virus
Definition
Very small microorganisms that have no metabolism and cannot reproduce apart form the host cell.
Term
reservoir
Definition
an area where the causative agent can live
Term
causative agent
Definition
a pathogen such as a bacteria, or virus that can cause disease.
Term
opportunistic infection
Definition
an infection that occurs as a result of the body's systems already being weakened.
Term
emerging
Definition
New disease, recently noted in the population.
Term
epidemiology
Definition
the study of occurrence of disease in populations.
Term
endemic
Definition
Refers to disease that is common or constantly present in a population, usually at a relatively constant low level.
Term
epidemic
Definition
Sudden increase in occurrence of a disease above the normal level in a particular population.
Term
Mode of transmission
Definition
a way the causative agent is spread from one reservoir to another
Term
immunity
Definition
the ability of a host to resist developing disease
Term
pandemic
Definition
increase in the occurrence of a disease throughout the world
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