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8 de ago. de 2021 · The initial epidemic curves of the COVID-19 outbreak from Hubei, China showed a mixed pattern, indicating that early cases were likely from a continuous common source e.g., from several zoonotic events in Wuhan, followed by secondary and tertiary transmission providing a propagated source for the later cases .
24 de oct. de 2016 · The epi curve of the outbreak among the crew members is shown in Figure 8. If the source is intermittent or continues over a long period of time, the curve will show a mix of individual and clustered cases during a relatively protracted time frame. Open in a separate window.
28 de jul. de 2009 · We suspect an outbreak if the epidemic curve looks unusual, in particular, if we find incidences that are significantly higher than expected if there is no outbreak. Such a purely qualitative judgment may suffice in a relatively simple and clear-cut setting as in the following examples of food poisoning, especially if supported by an a posteriori epidemiological analysis of the kind made there.
The epidemic curve can provide information on the progression of the outbreak, i.e., can tell whether the outbreak is ongoing, increasing in size, stabilizing, decreasing, or vanishing. The epidemic curve also determines the rate of increase or decrease of infectious cases over time. 3. Outliers of an epidemic.
We then compared fruit and vegetable outbreaks by characteristics of size, gender, age, age groups, geographic spread, duration, and velocity measures using Wilcoxon rank-sum tests. Epidemic curves were created to display visual representations of outbreak duration and velocity. We identified 14 fruit outbreaks and 24 vegetable outbreaks.
count cases in an outbreak, we like to put that tally to good use. We do this by creating an epidemic curve, or epi curve. While outbreak investigations can throw many unexpected curves, the epi curve is one that should be created in every potential outbreak situation. This issue of FOCUS explains how epi curves are used and describes meth-
In some common-source outbreaks, case-patients may have been exposed over a period of days, weeks, or longer. In a continuous common-source outbreak, the range of exposures and range of incubation periods tend to flatten and widen the peaks of the epidemic curve (Figure 1.22).The epidemic curve of an intermittent common-source outbreak often has a pattern reflecting the intermittent nature of ...
