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Infectious Process
Terms and Definitions
25
Medical
Professional
10/16/2009

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Term
Asepsis
Definition
Absence of pathogens
Term
Aseptic Technique
Definition
Involves procedures that render and maintain an object or area completely free of pathogens.
Term
Carriers
Definition
Persons who harbor pathogens without being sick themselves and who shed organisms into the environment.
Term
Communicable
Definition
Refers to a disease capable of being transmitted more or less rapidly to other persons; also called contagious.
Term
Contamination
Definition
Transmission of microorganisms from person to person or from object to person and vice versa.
Term
Decontamination
Definition
The process of removing organisms from articles, room, and linen after their use to make them safe to handle.
Term
Droplet nuclei
Definition
Very small masses of liquid carried in a spray from the nose or mouth which evaporate before settling and remain suspended in the air.
Term
Epidemiology
Definition
Division of medical science concerned with defining and explaining the interrelationships of the host, agent, and environment in causing disease.
Term
Fomites
Definition
Inanimate objects which are freshly contaminated with secretions or excretions from an infected person or carrier.  i.e. bedpans, sheets, drinking cups.
Term
Infection
Definition
Invasion of the body by pathogens and the reactions of the tissues to their presence and their toxins.
Term
Medical asepsis
Definition
Those procedures used to protect patient and environment from transmission of disease-producing organisms traveling from one patient to another.
Term
Medium
Definition
Agent through which microorganisms are transmitted.
Term
Opportunistic microorganisms
Definition
Microorganisms that do not normally invade tissue but that are capable of causing infection or disease when introduced mechanically or when host resistance is lowered.
Term
Pathogens
Definition
Disease causing microorganisms.
Term
Purulent
Definition
Forming or containing pus; suppurative.
Term
Sanitization
Definition
Deconstruction of bacteria through good cleaning processes or possibly by boiling in water.
Term
Sexually transmitted diseases (STD)
Definition
Disease acquired as a result of sexual intercourse with an infected individual.
Term
Sputum
Definition
Substance expelled by coughing or clearing the throat.
Term
Surgically clean
Definition
Not sterile, but as clean as possible.
Term
Terminal sterilization
Definition
Process of sterilizing articles after they have been used and before putting them into circulation again.
Term
Universal precautions
Definition
Guidelines recommended by the Centers for Disease Control (CDC) to prevent the transmission of blood-borne pathogens.
Term
Vector
Definition
An animal, especially an insect, that transmits pathogens from infected to nonoinfected individuals.
Term
Virulence
Definition
Relative power of a pathogen to cause disease.
Term
Primary-response phase
Definition
The phase during which the body produces (1) antibodies that "fit" the previously unrecognized antigen and (2) memory cells that will recognize that antigen during any subsequent exposure.
Term
Secondary-response phase
Definition
The phase during which the body is exposed to a subsequent invasion by an antigen, the memory cells immediately recognize the antigen, and the body produces antibodies against it.
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