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27 Cards in this Set

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The decrease or loss of virulence
attenuation
The presence of microorganism in the blood
bacteremia
A dense, well‑defined polysaccharide or protein layer closely surrounding a cell
capsule
The multiplication of a pathogen after it has gained access to host tissues
colonization
Tooth decay resulting from bacterial infection
dental caries
Bacterial cells encased in a matrix of extracellular polymers and salivary products, found on the teeth
dental plaque
Injury to the host that impairs host function
disease
The lipopolysaccharide portion of the cell envelope of certain gram‑negative Bacteria, which is a toxin when solubilized
endotoxin
A protein released extracellularly by a microorganism as it grows that produces immediate damage to the small intestine of the host
enterotoxin
A protein released extracellularly by a microorganism as it grows that produces immediate host cell damage
exotoxin
A bacterial toxin capable of hemolysis, the lysis of red blood cells
hemolysin
An organism that harbors a parasite
host
The growth of organisms in the host
infection
Pathogenicity caused by the ability of a pathogen to enter the body and spread
invasiveness
The trachea, bronchi, and lungs
lower respiratory tract
Layers of epithelial cells that interact with the external environment
mucous membrane
Soluble glycoproteins secreted by epithelial cells that coat the mucous membranes
mucus
Microorganisms that are usually found associated with healthy body tissue
normal microbial flora
An infection contracted in a hospital or health‑care setting
nosocomial infection
An organism that causes disease in the absence of normal host resistance
opportunistic pathogen
An organism that grows in or on a host and causes disease
parasite
An organism, usually a microorganism, that causes disease
pathogen
The ability of a pathogen to cause disease
pathogenicity
A diffuse deposit of polymer fibers, typically polysaccharides, that forms an outer surface layer on the cell
slime layer
Pathogenicity caused by toxins produced by a pathogen
toxicity
The nasopharynx, oral cavity, and throat
upper respiratory tract
The degree of pathogenicity displayed by a pathogen
virulence