Hepatitis B Medical Notification 01/07/04 - 30/09/04
During
the third quarter of 2004, 71 hepatitis B medical notifications were
received. Of these, three were acute clinical cases of hepatitis B
infection (Tables 3.1,
3.2).
A further 12 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
56 cases
(Table
3.3).
Injecting drug use was identified as an
exposure category for one of the three acute clinical cases with no
exposure categories identified for the remaining two cases (Table 3.1).
Of
the 56 reports of antigen positivity of uncertain duration, 26 tested
surface antigen positive for the first time this quarter, two had a
previous positive test and the testing history was unknown for the
remaining 28 cases. Among the 26 individuals who tested surface antigen positive
for the first time, but were not acute cases, the racial origin of nine
(35%) 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, 01/07/04 - 30/09/04 and year to date.
Exposure category by sex.
|
Exposure category |
3rd Quarter
01/07/04 - 30/09/04 |
Year to date
01/01/04 - 30/09/04 |
|
Male |
Female |
Male |
Female |
Total |
| IDU
|
-
|
1
|
2
|
1
|
3
|
| Heterosexual contact
|
-
|
-
|
-
|
1
|
1
|
| None identified
|
1
|
1
|
1
|
1
|
2
|
| Total
|
1
|
2
|
3
|
3
|
6
|
Table 3.2
Acute hepatitis B infection, 01/07/04 - 30/09/04 and year to date.
Age group by sex.
|
Age group (years) |
3rd Quarter
01/07/04 - 30/09/04 |
Year to date
01/01/04 - 30/09/04 |
|
Male |
Female |
Male |
Female |
Total |
|
10 - 19 |
-
|
-
|
-
|
1
|
1
|
|
20 - 29 |
-
|
2
|
-
|
2
|
2
|
|
30 - 39 |
-
|
-
|
2
|
-
|
2
|
|
40 - 49 |
1
|
-
|
1
|
-
|
1
|
|
Total |
1
|
2
|
3
|
3
|
6
|
Table 3.3
Hepatitis B infection, 01/07/04 - 30/09/04 and year to date.
Case category by sex.
|
Case category |
3rd Quarter
01/07/04 - 30/09/04 |
Year to date
01/01/04 - 30/09/04 |
|
Male |
Female |
Male |
Female |
Total |
|
Acute infection |
1
|
2
|
3
|
3
|
6
|
|
Antigen positive-
uncertain duration |
38
|
18
|
95
|
52
|
147
|
|
Chronic carriers-
>12 months duration |
6
|
6
|
26
|
17
|
43
|
|
Total |
45
|
26
|
124
|
72
|
196
|
Table 3.4
Individuals who tested hepatitis B surface
antigen positive for the
first time, 01/07/04 - 30/09/04 and year to date.
Race by sex.
|
Racial origin |
3rd Quarter
01/07/04 - 30/09/04 |
Year to date
01/01/04 - 30/09/04 |
|
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
1
|
-
|
3
|
4
|
7
|
|
Asian |
4
|
5
|
14
|
20
|
34
|
|
Caucasian |
6
|
1
|
15
|
3
|
18
|
|
Other/unknown |
6
|
3
|
19
|
8
|
27
|
|
Total |
17
|
9
|
51
|
35
|
86
|
Table 3.5
Summary of hepatitis B surface antigen
tests, 01/07/04 - 30/09/04
and year to date. Laboratory by sex.
|
Laboratory |
3rd Quarter
01/07/04 - 30/09/04 |
Year to date
01/01/04 - 30/09/04 |
|
Male |
Female |
Male |
Female |
Total |
|
Public |
4947
|
7276
|
15215
|
22153
|
37368
|
|
Private |
2109
|
3610
|
6236
|
10732
|
16968
|
|
Total |
7056
|
|
21451
|
32885
|
54336
|
|
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