Hepatitis B Medical Notification 01/04/06 - 30/06/06
During the second quarter of 2006, 64 hepatitis B
medical notifications were received.
There was only one acute clinical case of hepatitis B infection
reported this quarter (Table 3.1). The exposure category for the acute
clinical case was injecting drug use. Eleven notifications were
reports of chronic carriers of greater than twelve months duration who had
been previously diagnosed but not notified (Table
3.1)..
Reports of antigen positivity of uncertain duration accounted for
52 cases (Table 3.1).
Of the 52 reports of antigen positivity of
uncertain duration, 33 tested surface antigen positive for the first time
this quarter, two were previous positive but had not been notified, one
was a negative of greater than 12 months duration and the testing history
was unknown for the remaining 16 cases.
Among the 33 individuals who tested surface
antigen positive for the first time, but were not acute cases, the racial
origin of 13 (39%) was reported as Asian.
Among those reported as Other, 13 (39%) were of African origin (Table
3.3).
The number of hepatitis B surface antigen tests
performed by laboratories for this quarter is shown in Table 3.4.
Table
3.1 Hepatitis B
infection, 01/04/06 - 30/06/06 and year to date.
Case category by sex.
| Exposure
category |
2nd Quarter
01/04/06 - 30/06/06 |
Year to date
01/01/06 - 30/06/06 |
|
Male |
Female |
Male |
Female |
Total |
|
Acute
infection
|
1
|
-
|
1
|
-
|
1
|
|
Infection<12months
duration
|
-
|
-
|
-
|
1
|
1
|
|
Antigen
positive -
uncertain
duration
|
31
|
21
|
69
|
52
|
121
|
|
Chronic carriers -
>12
months duration
|
7
|
4
|
13
|
7
|
20
|
|
Total |
39
|
25
|
83
|
60
|
143
|
Table
3.2 Hepatitis B
infection, 01/04/06 - 30/06/06 and year to date.
Age group by sex.
|
Age
group |
2nd Quarter
01/04/06 - 30/06/06 |
Year to date
01/01/06 - 30/06/06 |
|
Male |
Female |
Male |
Female |
Total |
|
<10 |
-
|
1
|
-
|
3
|
3
|
|
10 - 19 |
5
|
2
|
9
|
6
|
15
|
|
20 - 29 |
9
|
6
|
23
|
19
|
42
|
|
30 - 39 |
17
|
8
|
30
|
20
|
50
|
|
40
- 49 |
5
|
5
|
9
|
6
|
15
|
|
³ 50 |
3
|
3
|
12
|
6
|
18
|
|
Total |
39
|
25
|
83
|
60
|
143
|
Table
3.3 Individuals who
tested hepatitis B surface antigen positive for
the first time, 01/04/06 - 30/06/06 and year to date. Race by sex.
|
Racial origin |
2nd Quarter
01/04/06 - 30/06/06 |
Year to date
01/01/06 - 30/06/06 |
|
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
-
|
2
|
2
|
3
|
5
|
|
Asian |
10
|
3
|
14
|
11
|
25
|
|
Caucasian |
1
|
1
|
7
|
4
|
11
|
|
Other/Unknown |
9
|
7
|
20
|
16
|
36
|
|
Total |
20
|
13
|
43
|
34
|
77
|
Table
3.4 Summary of
hepatitis B surface antigen tests, 01/04/06 - 30/06/06
and year to date. Laboratory by sex.
|
Laboratory |
2nd Quarter
01/04/06 - 30/06/06 |
Year to date
01/01/06 - 30/06/06 |
|
Male |
Female |
Unknown |
Male |
Female |
Unknown |
Total |
|
Public |
5335
|
8036
|
27
|
11023
|
16599
|
54
|
27676
|
|
Private |
1948
|
3452
|
-
|
3851
|
6917
|
-
|
10768
|
|
Total |
7283
|
11488
|
27
|
14874
|
23516
|
54
|
38444
|
|
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