Term
| organism which provides nutrients, etc. to another organism |
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Definition
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Term
| organism which lives at the expense of (and may even harm) its host; generally smaller than the host and is metabolically dependent upon it |
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Definition
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Term
| an upset in the homeostasis of the host, resulting in generation of observable changes |
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Definition
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Term
| objective evidence of damage to the host (fever, rash, vomiting) |
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Definition
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Term
| subjective evidence of damage to the host (headache, anorexia) |
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Definition
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Term
| one in which detrimental changes in health of the host occur as a result of damage caused by a parasite |
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Term
| microorganism that is capable of causing disease |
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Definition
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Term
| a measure of pathogenicity, which is the ability to cause disease |
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Definition
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Term
| microorganisms that readily cause disease (only small numbers of the microorganism are required to initiate and sustain infection) |
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Definition
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Term
| microorganisms with reduced ability to cause disease |
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Definition
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Term
| microorganisms that do not cause disease |
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Definition
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Term
| microorganisms that may or may not cause disease generally colonize, but do not infect, the host when usually found associated with a host, called normal microbiota can cause disease if they are inadvertently introduced into a site where they do not usually reside, especially inside host tissues |
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Definition
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Term
| enable parasites to attach to host cells or tissues |
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Definition
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Term
| enable parasites to enter and/or move through host cells or tissues |
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Definition
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Term
| enable parasites to escape from host defenses |
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Definition
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Term
| enable parasites to damage host cells |
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Definition
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Term
| study of the occurrence of disease in a human population, especially the cause (etiology) and transmission of disease |
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Definition
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Term
| commonly refers to an unusually high incidence of a disease in a community (population) at one time |
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Definition
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Term
| the proportion (or percentage) of diseased individuals in a population at one time |
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Definition
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Term
| the number of diseased individuals in a population at one time |
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Definition
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Term
| a disease is constantly present, usually at low incidence, in a population |
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Definition
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Term
| appearance of several cases of a disease, usually in a short period of time, in an area previously experiencing no cases or only sporadic (scattered or isolated) cases of the disease |
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Definition
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Term
| disease; sickness; clinical illness |
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Definition
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Term
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Definition
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Term
| a site in which infectious agents remain viable (alive) and from which infection of individuals may occur |
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Definition
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Term
| an infected individual which is not showing obvious signs or symptoms of clinical disease, but which is shedding the etiologic agent for a long period of time (greater than six months) |
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Definition
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Term
| diseases which occur primarily in animals but are occasionally transmitted to people |
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Definition
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Term
| living agent which transmits infectious agent |
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Definition
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Term
non-living object that transmits infectious agents
food/water? |
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Definition
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Term
If a microorganism is the causative (etiologic) agent of an infectious disease, it must be:
Present in every case of the disease, but absent from the healthy host
Isolated and grown in pure culture
Able to Cause the disease when a pure culture is inoculated into a healthy host
Re-isolated from the host that was inoculated with the pure culture |
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Definition
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Term
infection or intoxication of many people from a single contaminated source
characterized by rapid onset, "sharp" peak and rapid decline in incidence |
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Definition
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Term
introduction of an infected person into a susceptible population leads to transfer of the etiologic agent to others, who transfer it to many others
characterized by slow onset, "blunted" peak and slow decline in incidence |
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Definition
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