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isolation (i″so-la´shәn) the process of separating, or the state of being alone. the extraction and purification of a chemical substance of unknown structure from a natural source. the separation of infected individuals from those uninfected for the period of communicability of a particular disease; see also isolation precautions and quarantine. the successive propagation of a growth of microorganisms until a pure culture is obtained. a type of defense mechanism in which emotions are separated from the ideas, impulses, or memories that they are usually connected, so that they enter the consciousness detached from its unacceptable feeling. protective isolation
, reverse isolation
a formerly common type of isolation designed to prevent contact between potentially pathogenic microorganisms and persons
with seriously impaired resistance. The Centers for Disease Control and Prevention deleted this category in 1983, but a few
institutions continue to use it.
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