Term
| habitual presence of a disease among the population of a given geographic area |
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Definition
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Term
| occurrence of a group of illnesses of similar nature within a given community or region in excess of normal expectancy |
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| resistance of a group to an attack by a disease to which a large proportion of members are immune |
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Term
| severity of the disease produced by the organism. Usually expressed as a ratio. |
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| individual who harbors the organism but is not infected |
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Definition
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Term
| capacity of agent to enter and multiply in a susceptible host |
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| ratio of number of persons developing clinical illness/ number of exposed individuals |
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Term
| capacity of agent to cause clinical disease in the infected host. similar to virulence. |
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Term
| capacity of agent to produce toxin or poison |
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| ability of agent to survive adverse environmental conditions |
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| ability of agent to induce antibody production in the host |
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| infection's ability to produce specific immunity |
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Term
| person to person contact (propagated) |
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Term
| disease transmission by a common vehicle or vector |
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Definition
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Term
| mosquito transmission is an example of... |
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Term
| contaminated air or water supply tranmission is an example of... |
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Term
| before the first sign of symptoms |
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Definition
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Term
| time interval from infection to development of infectiousness |
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Term
| time during which the host can affect another host |
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Definition
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Term
| time from infection to development of symptomatic disease |
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Definition
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Term
| period in which symptoms are present |
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Definition
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Term
| hepatitis A versus influenza incubation period |
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Definition
| hepatitis has a longer incubation period going a longer time infected without symptoms. Notice symptoms sooner with influenza. |
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Term
| conditions for an outbreak include 4 things.... |
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Definition
1. increase in the amount or virulence of agent
2.recent introduction of the agent into a new setting
3. enhanced mode of transmission, exposing more susceptible individuals
4. factors that increase host exposure or involve introduction through new portals of entry (crowding) |
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Term
| outbreak investigations.... |
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Definition
1. determining cause of outbreak, eliminating or interrupting transmission, and providing post-exposure prophylaxis.
2.uncovers new infectious agents and diseases
3.identifies spread of a known virus to a new geographic area
4. improves epidemiological understanding by uncovering new means of disease transmission.
5. Leads to public health regulations/ recommendations to prevent future disease outbreaks. |
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Term
| 3 factors that affect disease transmission |
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Definition
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