Under investigation - A case which has been notified but information is not yet available to classify it as probable or confirmed.

Probable - A clinically compatible illness that is epidemiologically linked to a confirmed source.

Confirmed - A clinically compatible illness that is laboratory confirmed.

Not a case - A case that has been investigated and subsequently has been shown not to meet the case definition.

For more information refer to the Brucellosis section of the Communicable Disease Control Manual.