Epidemiology Answers – Flashcards
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Epidemiology |
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Endemic |
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constantly present within a population at low levels |
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Epidemic |
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simultaneous infection of large numbers in a population |
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Pandemic |
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very widespread disease, often worldwide |
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Infection |
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the organism invades and colonizes the host |
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Incubation period |
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the time between infection and onset of symptoms |
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Acute period |
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the disease is at its height |
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Decline period |
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disease symptoms are subsiding |
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Convalescent period |
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patient regains strength and returns to normal |
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Incidence |
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the number of new cases in a time period |
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Prevalence |
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the number of total cases, new and existing |
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Mortality |
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the incidence of death in a population |
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Morbidity |
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the incidence of disease including fatal and nonfatal diseases |
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Reservoir |
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Zoonosis |
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Epidemiological factors |
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Direct host-to-host transmission |
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infected individual transmits a disease directly to a susceptible host without the assistance of an intermediary (flu, common cold, STDs, ring worm) |
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Indirect host-to-host transmission |
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occurs when transmission is facilitated by a living or nonliving agent |
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Vectors |
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living agents that transmit disease |
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Fomite |
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nonliving agents that transmit disease (bedding, toys, cash, surgical instruments) |
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Common-source epidemic |
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Host-to-host epidemic |
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Herd immunity |
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Nosocomial infections |
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Why do people get HealthCare-Associated Infections? |
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