Hepatitis B
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 with positive HBsAG test.
Confirmed - A clinically compatible illness that is laboratory confirmed with a positive anti-HBc IgM test.
Not a case - A case that has been investigated, and subsequently has been found to not meet the case definition.

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

Hepatitis C
Under investigation - A case which has been notified but information is not yet available to classify it as probable or confirmed.
Confirmed - Demonstration of documented seroconversion to HCV when the most recent negative specimen was within the last 12 months OR demonstration of an anti-HCV positive test and a clinical illness consistent with acute HCV within the previous 12 months where other causes of acute hepatitis can be excluded.
Not a case - A case that has been investigated, and subsequently has been found to not meet the case definition.

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

Hepatitis NOS
Under investigation - A case which has been notified but information is not yet available to classify it as probable or confirmed.
Confirmed - An illness compatible with the diagnosis of hepatitis and a positive laboratory test.
Not a case - A case that has been investigated, and subsequently has been found to not meet the case definition.

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