(3) Flashcards
the study of the causes, occurrence, transmission, distribution, & prevention of diseases in a population
epidemiology
contaminated objects
fomites
biting insects
vectors
when a disease is transmitted from an area such as the heating or cooling system of a building or from contaminated water that affects many people at once
common source epidemic
the first case of such a disease
index case
the number of new cases of a disease reported in a defined population during a specific period of time
incidence rate
rate for the “disease” spreading through your class
prevalence rate
the number of cases of a disease at a specific point in time in a defined population
point prevalence
How is incidence rate calculated?
number of new cases in a time period ______
size of at-risk population at midpoint of time period
How is point prevalence calculated?
number of existing cases at a point in time_______ X K
total population
What does the symbol “K” represent?
Some power of 10 to bring the number up to one or more
the organism being considered can be found just about everywhere. More specifically, the organism likely could be isolated from soil, water, plants, & animals
ubiquity
they do not reside on or in a specific plant or animal host & are not known to cause disease
free-living
incapable of causing disease
nonpathogenic
an organism that serves as a habitat for another organism such as a parasite or commensal
host
