Epidemiology-
The study of diseases or conditions that influence the incidence,
distribution, and control of infectious diseases; the study
of disease occurrence in human populations.
Episome- A class of genetic elements of
bacteria that may exist either as autonomous entities, replicating
in the host independent of the bacterial chromosome, or
as segments of the bacterial chromosome, replicating with
it.
Eukarya- The super kingdom (or domain)
that includes all eukaryote organisms-plants, fungi and
animals.
Exposure- Contact with a substance by
swallowing, breathing, or touching the skin or eyes. Exposure
may be short-term, of intermediate duration, or long-term.