Hepatitis B Medical Notification 01/07/05 - 30/09/05
During
the third quarter of 2005, 73 hepatitis B medical notifications were
received. Of these, two were acute clinical cases of hepatitis B
infection
(Table 3.1, Table 3.2).
A further 13 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 58 cases
(Table
3.3).
Injecting
drug use was identified as an exposure category for one of the acute
clinical cases with no exposure category identified for the remaining case
(Table
3.1)
Of the 58 reports of antigen positivity of
uncertain duration, 36 tested surface antigen positive for the first time
this quarter, three had a previous negative test and the testing history
was unknown for the remaining 19 cases.
Among the 36 individuals who tested surface antigen positive for
the first time, but were not acute cases, the racial origin of 13 (36 %)
was reported as Asian and of those reported as other 13 (36%) were of
African origin
(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, 01/07/05 - 30/09/05 and year to date.
Exposure category by sex.
|
Exposure category |
3rd Quarter
01/07/05 - 30/09/05 |
Year to date
01/01/05 - 30/09/05 |
|
Male |
Female |
Male |
Female |
Total |
| IDU
|
-
|
1
|
-
|
1
|
1
|
| Country of birth
|
-
|
-
|
1
|
-
|
1
|
| Acupuncture |
1
|
-
|
1
|
-
|
1
|
| None identified
|
1
|
-
|
3
|
-
|
3
|
| Total
|
1
|
1
|
4
|
2
|
6
|
Table 3.2
Acute hepatitis B infection, 01/07/05 - 30/09/05 and year to date.
Age group by sex.
|
Age group (years) |
3rd Quarter
01/07/05 - 30/09/05 |
Year to date
01/01/05 - 30/09/05 |
|
Male |
Female |
Male |
Female |
Total |
|
<10 |
-
|
-
|
1
|
-
|
1
|
|
20 - 29 |
-
|
1
|
1
|
1
|
2
|
|
30 - 39 |
-
|
-
|
-
|
-
|
-
|
|
40 - 49 |
1
|
-
|
2
|
-
|
2
|
|
³
50 |
-
|
-
|
-
|
1
|
1
|
|
Total |
1
|
1
|
4
|
2
|
6
|
Table 3.3
Hepatitis B infection, 01/07/05 - 30/09/05 and year to date.
Case category by sex.
|
Case category |
3rd Quarter
01/07/05 - 30/09/05 |
Year to date
01/01/05 - 30/09/05 |
|
Male |
Female |
Male |
Female |
Total |
|
Acute infection |
1
|
1
|
4
|
2
|
6
|
|
Antigen positive-
uncertain duration |
34
|
24
|
126
|
81
|
207
|
|
Chronic carriers-
>12 months duration |
6
|
7
|
22
|
21
|
43
|
|
Total |
41
|
32
|
151
|
105
|
256
|
Table 3.4
Individuals who tested hepatitis B surface
antigen positive for the
first time, 01/07/05 - 30/09/05 and year to date.
Race by sex.
|
Racial origin |
3rd Quarter
01/07/05 - 30/09/05 |
Year to date
01/01/05 - 30/09/05 |
|
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
-
|
2
|
6
|
4
|
10
|
|
Asian |
3
|
10
|
20
|
25
|
45
|
|
Caucasian |
4
|
1
|
10
|
1
|
11
|
|
Other/unknown |
13
|
3
|
38
|
18
|
56
|
|
Total |
20
|
16
|
74
|
48
|
122
|
Table 3.5
Summary of hepatitis B surface antigen
tests, 01/07/05 - 30/09/05
and year to date. Laboratory by sex.
|
Laboratory |
3rd Quarter
01/07/05 - 30/09/05 |
Year to date
01/01/05 - 30/09/05 |
|
Male |
Female |
Unknown |
Male |
Female |
Unknown |
Total |
|
Public |
5371
|
7736
|
23
|
16733
|
23914
|
62
|
40709
|
|
Private |
2311
|
3822
|
-
|
6040
|
10775
|
-
|
16815
|
|
Total |
7682
|
11558
|
23
|
22773
|
34689
|
62
|
57524
|
|
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