Hepatitis B Medical Notification 01/04/05 - 30/06/05
During
the second quarter of 2005, 92 hepatitis B medical notifications were
received. Of these, only one was an acute clinical case of hepatitis B
infection (Table 3.1,
Table
3.2).
A further 14 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
77 cases (Table
3.3).
The exposure category for the acute
clinical case was not identified (Table 3.1).
Of
the 77 reports of antigen positivity of uncertain duration, 40 tested
surface antigen positive for the first time this quarter, four were
previous positives and the testing history was unknown for the remaining
33 cases. Among the 40
individuals who tested surface antigen positive for the first time, but
were not acute cases, the racial origin of 17 (43%) was reported as Asian.
Among those reported as Other, 13 (33%) 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, 01/04/05 - 30/06/05 and year to date.
Exposure category by sex.
| Exposure
category |
2nd Quarter
01/04/05 - 30/06/05 |
Year to date
01/01/05 - 30/06/05 |
|
Male |
Female |
Male |
Female |
Total |
|
Country
of Birth
|
-
|
-
|
1
|
-
|
1
|
|
Skin
piercing/acupuncture
|
-
|
-
|
1
|
1
|
2
|
|
None
Identified
|
1
|
-
|
1
|
-
|
1
|
|
Total |
1
|
-
|
3
|
1
|
4
|
Table
3.2 Acute hepatitis B
infection, 01/04/05 - 30/06/05 and year to date.
Age group by sex.
|
Age
group |
2nd Quarter
01/04/05 - 30/06/05 |
Year to date
01/01/05 - 30/06/05 |
|
Male |
Female |
Male |
Female |
Total |
|
<10 |
-
|
-
|
1
|
-
|
1
|
|
20 - 29 |
-
|
-
|
1
|
-
|
1
|
|
40
- 49 |
1
|
-
|
1
|
-
|
1
|
|
³ 50 |
-
|
-
|
-
|
1
|
1
|
|
Total |
1
|
-
|
3
|
1
|
4
|
Table
3.3 Hepatitis B
infection, 01/04/05 - 30/06/05 and year to date.
Case category by sex.
|
Case category
|
2nd Quarter
01/04/05 - 30/06/05 |
Year to date
01/01/05 - 30/06/05 |
|
Male |
Female |
Male |
Female |
Total |
|
Acute Infection |
1
|
-
|
3
|
1
|
4
|
|
Antigen positive -
uncertain duration |
47
|
30
|
88
|
53
|
141
|
|
Chronic carriers -
>12 months duration |
7
|
7
|
14
|
14
|
28
|
|
Total |
55
|
37
|
105
|
68
|
173
|
Table
3.4 Individuals who
tested hepatitis B surface antigen positive for
the first time, 01/04/05 - 30/06/05 and year to date. Race by sex.
|
Racial origin |
2nd Quarter
01/04/05 - 30/06/05 |
Year to date
01/01/05 - 30/06/05 |
|
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
2
|
-
|
5
|
2
|
7
|
|
Asian |
10
|
7
|
16
|
13
|
29
|
|
Caucasian |
4
|
-
|
6
|
-
|
6
|
|
Other/Unknown |
9
|
8
|
22
|
14
|
34
|
|
Total |
25
|
15
|
49
|
29
|
78
|
Table
3.5 Summary of
hepatitis B surface antigen tests, 01/04/05 - 30/06/05
and year to date. Laboratory by sex.
|
Laboratory |
2nd Quarter
01/04/05 - 30/06/05 |
Year to date
01/01/05 - 30/06/05 |
|
Male |
Female |
Unknown |
Male |
Female |
Unknown |
Total |
|
Public |
5778
|
8230
|
19
|
11362
|
16178
|
39
|
27540
|
|
Private |
1880
|
3380
|
-
|
3729
|
6953
|
-
|
10721
|
|
Total |
7658
|
11610
|
19
|
15091
|
23131
|
39
|
38261
|
|
Health
on the Net Code of Conduct for health-related sites