epidemiological unit definition
epidemiological unit means a group of aquatic animals that share approximately the same risk of exposure to a disease agent within a defined location. This risk may be because they share a common aquatic environment, or because management practices make it likely that a disease agent in one group of animals would quickly spread to another group of animals.
epidemiological unit means a number of animals (whether owned by the one person or otherwise) that are held, kept or handled in such a manner that they share the same likelihood of exposure to bovine tuberculosis and the control of the spread of infectious disease from the unit can be facilitated;