|
Hepatitis
B Medical Notification 01/10/04 - 31/12/04
During
the fourth quarter of 2004, 85 hepatitis B medical notifications were
received. Of these, two were acute clinical cases of hepatitis B
infection
(Table
3.3). AA further 15 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 68 cases (Table
3.3).
The exposure categories identified for the
acute clinical cases were heterosexual contact (1) and none identified (1)
(Table
3.1)
Of the 68 reports of antigen positivity of
uncertain duration, 34 tested surface antigen positive for the first time
this quarter, one had a previous negative test and the testing history was
unknown for the 33 remaining cases. Among the 34 individuals who
tested surface antigen positive for the first time, but were not acute
cases, the racial origin of 12 (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, year.
Exposure category by sex.
| Exposure category
|
Year
01/01/04 - 31/12/04
|
|
Male
|
Female
|
Total
|
|
IDU
|
3
|
1
|
4
|
|
Heterosexual contact
|
1
|
1
|
2
|
|
None identified
|
-
|
2
|
2
|
|
Total
|
4
|
4
|
8
|
n.a. not
applicable
Table 3.2
Acute hepatitis
B infection, year.
Age group by sex.
|
Age group (years)
|
Year
01/01/04 - 31/12/04 |
|
Male
|
Female
|
Total
|
|
10 - 19
|
-
|
1
|
1
|
|
20 - 29
|
-
|
3
|
3
|
|
30 - 39
|
4
|
-
|
4
|
|
Total
|
4
|
4
|
8
|
Table 3.3
Hepatitis B
infection, 01/10/04 - 31/12/04 and year.
Case category by sex.
|
Case category
|
4th
Quarter
01/10/04 - 31/12/04
|
Year
01/01/04 - 31/12/04
|
|
Male
|
Female
|
Male
|
Female
|
Total
|
|
Acute
infection
|
1
|
1
|
4
|
4
|
8
|
|
Antigen positive -
uncertain duration
|
40
|
28
|
134
|
81
|
215
|
|
Chronic carriers -
>12 months
|
12
|
3
|
41
|
21
|
62
|
|
Total
|
53
|
32
|
179
|
106
|
285
|
Table 3.4
Individuals who
tested hepatitis B surface antigen positive
for the first time, 01/10/04 - 31/12/04 and year. Race by sex.
|
Racial origin
|
4th
Quarter
01/10/04 - 31/12/04
|
Year
01/01/04 - 31/12/04
|
|
Male
|
Female
|
Male
|
Female
|
Total
|
|
Aboriginal
|
4
|
1
|
7
|
5
|
12
|
|
Asian
|
6
|
6
|
20
|
26
|
46
|
|
Caucasian
|
4
|
2
|
20
|
5
|
25
|
|
Other/unknown
|
7
|
4
|
26
|
12
|
38
|
|
Total
|
21
|
13
|
73
|
48
|
121
|
Table 3.5
Summary of
hepatitis B surface antigen tests, 01/10/04 - 31/12/04
and year.
Laboratory by sex.
|
Laboratory
|
4th
Quarter
01/10/04 - 31/12/04
|
Year
01/01/04 - 31/12/04
|
|
Male
|
Female
|
Unknown
|
Male
|
Female
|
Unknown
|
Total
|
|
Public
|
5174
|
7298
|
24
|
20389
|
29451
|
106
|
49946
|
|
Private
|
1910
|
3412
|
-
|
8146
|
14144
|
-
|
22290
|
|
Total
|
7084
|
10710
|
24
|
28535
|
43595
|
106
|
72236
|
|
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