Hepatitis B Medical Notification 01/04/07 - 30/06/07
During
the second quarter of 2007, 153 hepatitis B medical notifications were
received. There were no acute
clinical cases of hepatitis B infection reported this quarter. Forty five
notifications were reports of chronic carriers of greater than twelve
months duration who had been previously diagnosed but not notified.
Reports of antigen positivity of uncertain duration accounted for
108 cases (Table 3.1).
Of
the 108 reports of antigen positivity of uncertain duration, 64 tested
surface antigen positive for the first time this quarter. Four cases were
previous positives (less than 12 months duration) but had not been
notified and two cases were negatives of greater than 12 months duration.
The testing history was unknown for the remaining 38 cases.
Among
the 64 individuals who tested surface antigen positive for the first time,
but were not newly acquired cases, the racial origin of 24 (36%) was
reported as Asian and 27
(40%) 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, 01/04/07 - 30/06/07 and year to date.
Case category by sex.
| Exposure
category |
2nd Quarter
01/04/07 - 30/06/07 |
Year to date
01/01/07 - 30/06/07 |
|
Male |
Female |
Male |
Female |
Total |
|
Acute
infection
|
-
|
-
|
-
|
1
|
1
|
|
Infection<12months
duration
|
-
|
-
|
1
|
-
|
1
|
|
Antigen
positive -
uncertain
duration
|
59
|
49
|
95
|
77
|
172
|
|
Chronic carriers -
>12
months duration
|
18
|
27
|
33
|
37
|
70
|
|
Total |
77
|
76
|
129
|
115
|
244
|
Table
3.2 Hepatitis B
infection, 01/04/07 - 30/06/07 and year to date.
Age group by sex.
|
Age
group |
2nd Quarter
01/04/07 - 30/06/07 |
Year to date
01/01/07 - 30/06/07 |
|
Male |
Female |
Male |
Female |
Total |
|
<10 |
1
|
2
|
1
|
2
|
3
|
|
10 - 19 |
11
|
7
|
16
|
9
|
25
|
|
20 - 29 |
18
|
14
|
31
|
25
|
56
|
|
30 - 39 |
16
|
17
|
29
|
28
|
57
|
|
40
- 49 |
18
|
20
|
32
|
27
|
59
|
|
³ 50 |
13
|
16
|
24
|
20
|
44
|
|
Total |
77
|
76
|
129
|
115
|
244
|
Table
3.3 Individuals who
tested hepatitis B surface antigen positive for
the first time, 01/04/07 - 30/06/07 and year to date. Race by sex.
|
Racial origin |
2nd Quarter
01/04/07 - 30/06/07 |
Year to date
01/01/07 - 30/06/07 |
|
Male |
Female |
Male |
Female |
Total |
|
Aboriginal |
2
|
1
|
4
|
3
|
7
|
|
African |
19
|
8
|
23
|
10
|
33
|
|
Asian |
10
|
13
|
17
|
23
|
40
|
|
Caucasian |
3
|
1
|
9
|
4
|
13
|
|
Other/Unknown |
3
|
4
|
5
|
4
|
9
|
|
Total |
37
|
27
|
58
|
44
|
102
|
Table
3.4 Summary of
hepatitis B surface antigen tests, 01/04/07 - 30/06/07
and year to date. Laboratory by sex.
|
Laboratory |
2nd Quarter
01/04/07 - 30/06/07 |
Year to date
01/01/07 - 30/06/07 |
|
Male |
Female |
Unknown |
Male |
Female |
Unknown |
Total |
|
Public |
3898
|
6041
|
16
|
9407
|
15054
|
38
|
24499
|
|
Private |
2377
|
3873
|
-
|
5416
|
8911
|
-
|
14327
|
|
Total |
6275
|
9914
|
16
|
14823
|
23965
|
38
|
38826
|
|
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