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Hepatitis B Surveillance in South Australia

Hepatitis B Medical Notification 01/04/02 - 30/06/02

During the second quarter of 2002, 66 hepatitis B medical notifications were received. Of these, two were acute clinical cases of hepatitis B infection (Tables 3.1, 3.2). A further seven were reports of chronic carriers of greater than twelve months duration, who had been previously diagnosed, but not notified (Table 3.3). Reports of antigen positivity of uncertain duration accounted for 57 cases (Table 3.3).

Exposure categories identified for the two acute clinical cases were homosexual contact (1) and heterosexual contact (1) (Table 3.1).

Of the 57 reports of antigen positivity of uncertain duration, 40 tested surface antigen positive for the first time this quarter, one had a previous negative test and the testing history was unknown for the remaining 16 cases. Among the 40 individuals who tested surface antigen positive for the first time, but were not acute cases, the racial origin of 25 (63 %) was reported as Asian (Table 3.4).

The number of hepatitis B surface antigen tests performed by laboratories for this quarter is shown in Table 3.5.

Table 3.1 Acute hepatitis B infection, 01/04/02 - 30/06/02. 
Exposure category by sex.

Table 3.2 Acute hepatitis B infection, 01/04/02 - 30/06/02. 
Age group by sex.

Table 3.3 Hepatitis B infection, 01/04/02 - 30/06/02. 
Case category by sex.

Table 3.4 Individuals who tested hepatitis B surface antigen 
positive for the first time, 01/04/02 - 30/06/02. Race by sex.

Table 3.5 Summary of hepatitis B surface antigen tests, 
01/04/02 - 30/06/02. Laboratory by sex.

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