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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.
A chart or graph in which the number of new cases of an illness is plotted over time.
See also: 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.
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.
the theoretical frequency distribution whose closeness of fit to the subject data is under test.
a line drawn in by hand on a scattergram to establish the relationship between two variables.
a curve representing graphically the probabilities of different numbers of occurrences of an event.
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.
as for logarithmic curve except that only one of the variables is scaled as a logarithm. See also logarithmic relationship.
an S-shaped curve. A common curve in biological distributions.
a graphic presentation of a life table. Obviously the proportion of survivors decreases with advancing age of the group.
the downward curve of the thoracolumbar region and that of the cervical region in some animals.
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).
see epidemic curve.
epidemic diarrhea of infant mice
see murine epizootic diarrhea.
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.
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.
see avian encephalomyelitis.