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23 Cards in this Set
- Front
- Back
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Infection
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multiplication of parasite in/on host
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Asymptomatic infection
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infection produces no or little symptoms of disease, may occur without symptoms
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Infestation
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presence of helminth or arthropod parasites in/on host (macroscopic parasite)
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Disease
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infections disturb health status of host
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Pathogenicity
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capacity of microbe to produce disease
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Virulence
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severity of disease
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Virulence factors
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structural or physiological factors that promote mircrobial infection/disease
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Resident microflora
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microbes that are always present in or on the host, normal flora are restricted to specific areas of host
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Non-sterile sites
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tissues that have evolved to tolerate and support the presence of normal flora (alimentary canal,skin,upper RT,etc.)
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Sterile sites
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tissues and organs that do not tolerate the presence of ANY microorgranism including normal flora
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Opportunistic pathogens
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normal flora that can cause disease under certain conditions (introduction of NF to sterile site-blood,lower RT(lungs),middle/inner ear)
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Pathogens
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microbe generally causes infection/disease (not part of normal flora)
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Epidemiology
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study of the mechanisms involved in the spread and frequency of disease
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Etiology
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cause of the disease
(etiological agent=infectious agents) |
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Incidence
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# of new cases of specific disease that occur within specific period of time (1 year)
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Prevalence
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total # of cases of disease
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Morbidity (rate)
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(# of) individuals infected with a specific infectious agent with associated disease
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Mortality (rate)
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(# of) deaths due to a specific infectious agent associated with disease
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Endemic
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disease (infectious agent) is continually present in local environment
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Sporadic disease
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random and unpredictable patterns of disease
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Common source outbreak
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multiple individuals infected from single source (contaminated water supply or food source)
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Epidemic
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disease occurs with higher than normal frequency in population
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Pandemic
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global infection with specific pathogen
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