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Appendix 1 - Case Definitions

The following table displays the case definitions for bloodborne diseases notified to the National Notifiable Diseases Surveillance System in 1999. If you are not able to access these data please e-mail cdi.editor@health.gov.au

Appendix 1b. Case definitions and ICD-10 code for notifiable diseases reported to NNDSS in 1999, bloodborne diseases

Disease	Case definition (NHMRC 1994)	ICD-10 code(s)
Hepatitis B (incident)	Demonstration of documented seroconversion to HBV	B16
Hepatitis B (unspecified)	HBsAg positive AND either: anti-HBcIgM positive OR demonstration of a clinical illness consistent with acute viral hepatitis (jaundice, elevated aminotransferases)	B18.0, B18.1
Hepatitis C (incident)	Demonstration of documented seroconversion to hepatitis C	B17.1
Hepatitis C (unspecified)	Demonstration of anti-hepatitis C positive or hepatitis C PCR positive AND a clinical illness consistent with acute viral hepatitis AND is not an acute case of hepatitis A, B, or D.	B18.2
Hepatitis D*	Positive for anti-HDV or HDV Ag or seroconversion or rise in IgG in serum or liver AND HBSAG OR anti-HBc negative	B17.0, B16.1, B18.0
Hepatitis (NEC)	Any other viral hepatitis not classified here	17.8

All definitions from Surveillance Case Definitions, National Health and Medical Research Council, March 1994, except those marked * which are draft summary definitions from the Communicable Diseases Network Australia (January 2001). Some Australian States and Territories have their own case definitions for some diseases, which may vary from those shown here.


This article was published in Communicable Diseases Intelligence Volume 25, No 4, November 2001.