# epidemic curve

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Related to epidemic curve: point source epidemic, Outbreak Investigation

## ep·i·dem·ic curve

a graph in which the number of new cases of a disease is plotted against an interval of time to describe a specific epidemic or outbreak.

## epidemic curve

A chart or graph in which the number of new cases of an illness is plotted over time.

## curve

a line that is not straight; the line representing varying values in a graph.

area under moment curve
plasma drug concentration × time after dosing versus time after drug administration.
area under the curve
the area under a plasma concentration versus time curve. A measure of drug absorption.
epidemic curve
a graphical representation showing the number of new cases of the disease plotted against time. A decision on when the new infection rate creates an epidemic varies with the disease and the circumstances. The rate would need to be clearly in excess of its expected frequency.
fitted curve
the theoretical frequency distribution whose closeness of fit to the subject data is under test.
freehand curve
a line drawn in by hand on a scattergram to establish the relationship between two variables.
frequency curve
a curve representing graphically the probabilities of different numbers of occurrences of an event.
logarithmic curve
the curve which demonstrates the straightline relationship between two variables when both of them are scaled as logarithms.
log dose-response curve
the standard way of presenting pharmacological data about a drug. The response is plotted against dose on a semilogarithmic graph. It has the advantage that a wide range of dose rates can be entered on the one graph.
plasma concentration-time curve
the plasma concentration of a drug plotted against time.
semilogarithmic curve
as for logarithmic curve except that only one of the variables is scaled as a logarithm. See also logarithmic relationship.
sigmoid curve
an S-shaped curve. A common curve in biological distributions.
survivorship curve
a graphic presentation of a life table. Obviously the proportion of survivors decreases with advancing age of the group.
vertebral curve
the downward curve of the thoracolumbar region and that of the cervical region in some animals.

## epidemic

a level of disease occurrence in an animal population which is significantly greater than usual; only occasionally present in the population, widely diffused and rapidly spreading. The disease is clustered in space and time. The word has common usage in veterinary science in preference to the more accurate, epizootic.

common source epidemic
see point epidemic (below).
epidemic curve
see epidemic curve.
epidemic diarrhea of infant mice
see murine epizootic diarrhea.
epidemic hyperthermia
poisoning by Neotyphodium (Acremonium) coenophialum; called also fescue summer toxicosis.
multiple event epidemic
when the epidemic begins at about the same time in a number of places, e.g. when a poisoned batch of feed is supplied to a number of farms.
point epidemic
when the epidemic begins at one central point, with a large number of animals coming in contact with the source over a short time; a very rapid form of spread with a number of cases presenting with the same stage of the disease at the one time, indicating the single source of the pathogen.
propagated epidemic, propagative epidemic, propagating epidemic
outbreaks in which the disease propagates in one or more initial cases and then spreads to others, a relatively slow method of spread.
epidemic tremor
epidemic typhus
see rickettsiaprowazeki.
References in periodicals archive ?
The PEP Impact model uses median projected daily case counts (output from the Epidemic Curve model) to estimate the potential effects of a PEP campaign.
Joinpoint analysis of the slope of the epidemic curve (Figure 2) demonstrated a statistically significant difference during the period after the first ETU and laboratory became operational compared with the preceding 9 weeks (p < 0.
In addition, patients with AEI might have been less likely to seek medical care for their symptoms, once the community perceived Zika virus infection as benign, making the AEI epidemic curve shorter.
This led to suspect a common source of the outbreak, although the second part of the epidemic curve could have been stretched because of secondary person-to-person transmission.
Methods: INFERNO incorporates existing knowledge of infectious disease epidemiology into adaptive forecasts and uses the concept of an outbreak signature as a composite of disease epidemic curves.
One limitation of the projections was that the estimated epidemic curve for Bahia State was based on Salvador, the capital city, which contains only -18% of the population of Bahia State.
Although no obvious source of norovirus was determined, the epidemic curve and laboratory data were consistent with a single contamination event such as fecal incontinence that occurred on either Friday night or Saturday morning.
The epidemic curve peaked in the first week of May, which was 1 week after molecular diagnosis of ZIKV in 8 patients residing ~50 km from Salvador and during a period of intense media coverage of the outbreak (Figure) (6).
Delays in implementation will result in falling further behind the epidemic curve and in an even greater need for patient care facilities.
The epidemic curve (Figure 2) suggests that by 2013, the N.
Eventually, transmission to health care workers, patients, and visitors resurged, leading to an additional 79 cases, as evident in the bimodal shape of the epidemic curve.
The epidemic curve of the outbreak is shown in the Figure.

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