Hepatitis B Medical Notification 01/04/04 - 30/06/04
During the second quarter of 2004, 62 hepatitis B
medical notifications were received.
Of these, 2 were acute clinical cases of hepatitis B infection (Table 3.1,
Table
3.2).
A further 18 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 42 cases (Table
3.3).
Exposure categories identified for the
acute clinical cases were injecting drug use (1) and heterosexual contact
(1) (Table 3.1).
Of
the 42 reports of antigen positivity of uncertain duration, 30 tested
surface antigen positive for the first time this quarter and the testing
history was unknown for the remaining 12 cases. Among
the 30 individuals who tested surface antigen positive for the first time,
but were not acute cases, the racial origin of 13 (43 %) 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, 01/04/04 - 30/06/04 and year to date.
Exposure category by sex.
| |
2nd Quarter
01/04/04 - 30/06/04 |
Year to date
01/01/04 - 30/06/04 |
| Exposure
category |
Male |
Female |
Male |
Female |
Total |
|
IDU |
1
|
-
|
2
|
-
|
2
|
|
Heterosexual |
-
|
1
|
-
|
1
|
1
|
|
Total |
1
|
1
|
2
|
1
|
3
|
Table
3.2 Acute hepatitis B
infection, 01/04/04 - 30/06/04 and year to date.
Age group by sex.
|
|
2nd Quarter
01/04/04 - 30/06/04 |
Year to date
01/01/04 - 30/06/04 |
| Age
group |
Male |
Female |
Male |
Female |
Total |
|
10 - 19 |
-
|
1
|
-
|
1
|
1
|
|
20 - 29 |
-
|
-
|
-
|
-
|
-
|
|
30 - 39 |
1
|
-
|
2
|
-
|
2
|
|
40
- 49 |
-
|
-
|
-
|
-
|
-
|
|
³ 50 |
-
|
-
|
-
|
-
|
-
|
|
Total |
1
|
1
|
2
|
1
|
3
|
Table
3.3 Hepatitis B
infection, 01/04/04 - 30/06/04 and year to date.
Case category by sex.
|
|
2nd Quarter
01/04/04 - 30/06/04 |
Year to date
01/01/04 - 30/06/04 |
|
Case category
|
Male |
Female |
Male |
Female |
Total |
|
Acute Infection |
1
|
1
|
2
|
1
|
3
|
|
Antigen positive -
uncertain duration |
29
|
13
|
53
|
31
|
84
|
|
Chronic carriers -
>12 months duration |
12
|
6
|
19
|
11
|
30
|
|
Total |
42
|
20
|
74
|
43
|
117
|
Table
3.4 Individuals who
tested hepatitis B surface antigen positive for
the first time, 01/04/04 - 30/06/04 and year to date. Race by sex.
|
|
2nd Quarter
01/04/04 - 30/06/04 |
Year to date
01/01/04 - 30/06/04 |
| Racial origin |
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
1
|
-
|
2
|
2
|
4
|
|
Asian |
5
|
8
|
10
|
15
|
25
|
|
Caucasian |
4
|
-
|
9
|
2
|
11
|
|
Other/Unknown |
9
|
3
|
13
|
5
|
18
|
|
Total |
19
|
11
|
34
|
24
|
58
|
Table
3.5 Summary of
hepatitis B surface antigen tests, 01/04/04 - 30/06/04
and year to date. Laboratory by sex.
|
|
2nd Quarter
01/04/04 - 30/06/04 |
Year to date
01/01/04 - 30/06/04 |
|
Laboratory |
Male |
Female |
Unknown |
Male |
Female |
Unknown |
Total |
|
Public |
5152
|
7265
|
-
|
10268
|
14877
|
-
|
25145
|
|
Private |
2041
|
3458
|
-
|
4127
|
7122
|
-
|
11249
|
|
Total |
7193
|
10723
|
|
14395
|
21999
|
|
36394
|
|
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