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Click on the pyramid above
to view more
information about each of these surveys.
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The burden of illness pyramid is a model for understanding
foodborne disease reporting. This illustration shows
the chain of events that must occur for an episode
of illness in the population to be registered in surveillance.
At the bottom of the pyramid, 1) some of the general
population is exposed to an organism; 2) some exposed
persons become ill; 3) the illness is sufficiently
troubling that some persons seek care; 4) a specimen
is obtained from some persons and submitted to a clinical
laboratory; 5) a laboratory appropriately tests the
specimen; 6) the laboratory identifies the causative
organism and thereby confirms the case; 7) the laboratory-confirmed
case is reported to a local or state health department.FoodNet
conducts laboratory surveys, physician surveys, and
population surveys to collect information about each
of these steps.
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