| Term | Definition |
|---|
| symbiosis | living together |
| mutualism | is where both organisms benefit |
| commensalism | where one organism benefits and the other neither benefits nor is harmed |
| parasitism | is where one organism benefits and the other is harmed |
| pathogenicity | is the capacity of a pathogen to produce disease |
| pathogenicity factors | ability to invade the host, multiply in the host, ability to avoid damage by host's defenses, number of organisms that enter body, virulence factors |
| virulence | is the intensity of a disease caused by a pathogen |
| attenuation | is the weakening of a pathogen's disease producing capacity |
| normal microflora | microorganisms found in or on the body that do not normally cause disease |
| resident microflora | are those organisms that are always presents in or on the body |
| transient microflora | present temporarily or under certain conditions migrate through the body |
| opportunist | are resident or transient microflora that can cause disease under certain conditions |
| communicable diseases | contagious they can be spread from one host to another |
| no communicable disease | cannot be spread from host to host and may be acquired from soil water, or food |
| virulence factors | enable microbes in stablishment of infections |
| adhering | by colonizing or by invading host tissues and sometimes by invading cells |
| hemolysins | lyse red blood cells in cultures and may not directly cause tissue damage in the host |
| leukocidins | destroy neutrophils |
| coagulase | accelerates blood clots |
| streptokinase | digests blood clots and helps pathogens spread to the body tissues |
| endotoxins | release when cell divide or are killed |
| exotoxins | are produced by and release from bacteria |
| toxoids | are inactivated exotoxins that retain antigenic properties and are used for immunization |
| hemolysins | rupture red blood cells |
| leukocidins | are exotoxins that destroy white blood cells |
| neurotoxins | acts on the nervous system |
| acute disease | develops rapidly and runs its course quickly |
| chronic disease | develops slowly and last a long time |
| local infection | is confined to small region of the body |
| systemic infection | pathogen spreads throughout the body |
| septicemia | describes the presence of pathogens in the blood |
Combine with other sets
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