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when a microrganism or a certain living agent enters the body of a human or an animal, multiplies and causes a reaction
the mere presence of infectious material; the act of introducing disease, germs, or infectious material into an area or substance
an organism that exist as part of the normal flora but may become pathogenic under certain conditions
the ability of a pathogen to overcome the defensive powers of the host and to induce disease
the degree of pathogenicity possessed by the organism to produce disease;the degree of intensity of the disease produced
an infection caused by a different organism then the one causing the primary infection
an infection confined to 1 anatomical spot from which infectious material spread to other parts of the body
an infection that runs a rapaid course with severe manifestations (between 12-48 hours)
an infection that comes from an organism that is normally present in the body (aka opportunist)
an infection in which the causitive agent reaches the body from the outside and enters through one of the portals of entry
one whose agent is normally inhabiting the body and only occassionaly producing disease. or resides outside the body producing disease only when introduced into the body)
an appearence of infectious disease or condition that attacks many people at the same time in the same geographical area
an infectious disease affecting the majority of a population of a large region, or onethat is an epidemic at the same time in many parts of the world
when bacteria enters the blood stream, multiply, causing an infection of the blood stream itself
when bacteria enter the blood stream and do NOT multiply; or the presence of a viable (living, thriving) in the blood stream.
factors that influence the virulence of a microbe
has a capsule, pili, spores, toxin producer, enzyme producer
toxin produced by a bacterial cell released into its environment when the bacterial cell is alive
an animal or human that has NO infection but the pathogen is in or on the carrier with no interaction
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