Northern Territory
Sexual Health and Blood Borne Viruses Unit Surveillance Update
Department of Health and Community Services, Vol. 7 No 1, January-March 2006 & April-June 2006
A. Introduction
This surveillance update presents quarterly statistics for notifiable sexually transmissible infections (STIs) and blood borne viruses (BBVs) at district level in the Northern Territory (NT) for the first two quarters of 2006. Where appropriate, disease rate comparisons with other jurisdictions and/or Australia as a whole are also provided. It is hoped that this report may inform service providers who can use the information for the planning of targeted prevention and intervention programs.
The report consists of sections devoted to individual notifiable sexually transmissible infections (gonorrhoea, chlamydia, syphilis and trichomoniasis) and blood borne viruses (hepatitis C and human immunodeficiency virus). Other notifiable STIs are presented separately due to the small numbers of cases. In this issue, there is also a summary report on the surveillance of antibiotic sensitivity of Neisseria gonorrhoea in the NT for 2005.
As this report mainly covers the statistics of the first half of 2006, the notification rates presented are all annualised rates unless specified otherwise.
All notification data used have been extracted from the Northern Territory Notifiable Diseases Surveillance System (NTNDSS). Other data used includes HIV and AIDS data from the HIV/AIDS Database maintained by the Sexual Health and Blood Borne Virus Unit
(SHBBVU), and the antibiotic sensitivity data of Neisseria gonorrhoea supplied by relevant pathology laboratories. The statistics of Australia and other states/territories used for comparison were extracted from ‘HIV/AIDS, Viral Hepatitis and Sexually Transmissible Infections in Australia Annual Surveillance Report 2005’ published by National Centre in HIV Epidemiology and Clinical Research. NT population data for the year 2006 by age, sex and district was produced and provided by the Health Gains Planning based on 2006 SLA based population projections (unpublished ABS data).
B. Quarterly Notifications
The following comments relate specifically to the numbers and rates of notifications for the two quarters covered by this report in comparison to the same time period in the previous years, or, where specified, the preceding six months of the last surveillance report.
B.1 Gonorrhoea
In this reporting period, 1,013 gonorrhoea cases were notified (988.5 cases per 100,000 population1, see Table 1.12 and Figure 1.1). The annualised rate for this 6-month period, like the corresponding rate for 2005, was significantly higher than the expected value according to the increasing trend calculated based on the 2000-2004 data (see Figure B.1.1 below). The increase of gonorrhoea notifications was again noted in the first quarter when there was no known large-scale screening activity, similar to the situation in 2005. This indicates that this increase is most likely a true increase in incidence.
Figure B.1.1 Annualised notification rate of gonorrhoea, NT, Jan-Jun 2000-2006
0 200 400 600 800 1000
2000 2001 2002 2003 2004 2005 2006
Annualised Rate (per 100,000 population)
2000-2004 2005-2006
Linear Trend based on 2000-2004 data
The number of notifications for females was about 4% higher than for males, but the notification rate for females was 13% higher; both rates were roughly the same as those for 2005. (Table 1.2 and Figure 1.2).
1 This annualised rate was calculated by dividing 1013 (the number of gonorrhoea cases for the two quarters) with half of the 2006 NT population.
2 Figures and tables with Arabic numbers are placed at the back of the report.
About 87% of all notifications were Aboriginal (Table 1.3 and Figure 1.3). The Aboriginal rate was nearly 30 times the non-Aboriginal rate. Both rates were considerably higher than the corresponding national average (37.0 per 100,000 in 2004).
Alice Springs district contributed 62% of all notified cases (Table 1.4). The rates of
gonorrhoea for the five districts were all considerably higher than the national average, with the rate for Alice Springs being the highest at about 3,200 per 100,000 (or, 3.2%).
About two-thirds of the disease burden of gonorrhoea in Darwin District was recorded in the urban area. In the Alice Springs District 55% was recorded in the rural area where an
extremely high notification rate was recorded (about 5.3%).
The notification rate was highest in the age groups 20-24 years and 15-19 years. These age groups accounted for about half of all gonorrhoea notifications during this reporting period (Table 1.6). As shown in Table B.1.1, the Aboriginal notification rate for both rural and urban Alice Springs was about 22%, about ten times higher than the corresponding rates for Darwin District. The non-Aboriginal rate for Darwin Urban area was 148.4 per 100,000 population, slightly higher than the national rates for these age groups, which were between 90 to 100 per 100,000 population in 2004.
Table B.1.1 Notification rates of gonorrhoea for 15-24 year olds by ethnicity and district, Darwin & Alice Springs, Jan-Jun 2006
Aboriginal Non-Aboriginal Unknown District
Number Rate Number Rate Number Alice Springs Rural 218 22244.9 0 <10 Alice Springs Urban 96 22561.7 <10 <10 Darwin Rural 24 2343.8 <10 10 Darwin Urban 19 1791.6 11 148.4 <10
B.2 Genital Chlamydia
There were 1,095 notifications of genital chlamydia in the NT in this reporting period, giving an annualised notification rate of 1,068.5 cases per 100,000 population (see Table 1.1 and Figure 1.1).
Both were significantly higher than the corresponding figures for 2005 (28% and 26% higher, respectively). Like gonorrhoea, this annualised rate was higher than the expected value according to the increasing trend calculated using 2000-2004 data (see Figure B.2.1 below).
In terms of case numbers, Aboriginal people represented 64% of all cases, about 2.4 times the number for non-Aboriginal people. However, the Aboriginal rate was 6 times the non-Aboriginal rate (Table 1.3), compared with the Aboriginal to non-Aboriginal rate ratio of 30 to 1 for gonorrhoea. Both rates were considerably higher than the national notification rate (186.1 per 100,000 in 2004).
Figure B.2.1 Annualised notification rate of chlamydia, NT, Jan-Jun 2000-2006
0 200 400 600 800 1000
2000 2001 2002 2003 2004 2005 2006
Annualised Rate (per 100,000 population)
2000-2004 2005-2006
Linear Trend based on 2000-2004 data
About 46% of all chlamydia cases were notified in the Alice Spring District, followed by Darwin (38%). Alice Spring District also recorded the highest rate in the NT, about 4 times that of Darwin District (Table 1.4).
In terms of disease burden, the urban to rural rate ratio was 5.4:1 in Darwin and 0.75:1 in Alice Springs (Table 1.5). The notification rate for Alice Springs Rural area was about 4.2%, substantially higher than other three areas.
The highest rate was recorded in the age groups 20-24 years and 15-19 years with both rates exceeding 4% (Table 1.6). These two age groups represented nearly 60% of all cases. A more detailed analysis was performed for these two age groups in Darwin and Alice Springs District with breakdown by urban and rural areas and presented in Table B.2.1 below. The Aboriginal rate was 18% for both rural and urban Alice Springs areas, while the non-Aboriginal rate was around 1,800 per 100,000 population for the urban area of both Alice Springs and Darwin District, compared with the national rates for these two age groups between 500 to 700 per 100,000 population in 2004. It is worth noting that in Darwin Urban area, the number of non-Aboriginal notifications was 4 times that for Aboriginal ones while in Alice Urban area the number of non-Aboriginal notifications was only one third that for Aboriginal ones.
Table B.2.1 Notification rates of chlamydia for 15-24 year olds by ethnicity and district, Darwin & Alice Springs, Jan-Jun 2006
Aboriginal Non-Aboriginal Unknown District
Number Rate Number Rate Number Alice Springs Rural 178 18163.3 <10 <10 Alice Springs Urban 79 18566.4 25 1847.1 <10 Darwin Rural 24 2343.8 <10 <10
Darwin Urban 34 3206.0 139 1875.8 34
B.3 Syphilis
A total of 159 syphilis3 notifications were recorded for this reporting period, which represented a 34% increase over the 119 notifications in the same period of 2005 (Table 1.1) and a reverse of the decreasing trend noted in the last 4 years (Figure 1.1). The annualised rate for this period of 155.2 per 100,000 population is more than 15 times the national rate (less than 10 per 100,000 population in 2004).
There were considerably more female notifications than male, particularly in the second quarter (Table 1.2). Aboriginal people accounted for 94% of the total notifications in this 6- month period and the Aboriginal rate was 65 times the non-Aboriginal rate (Table 1.3). The Aboriginal rate of 522.5 per 100,000 population represented a 45% increase over the corresponding rate for 2005 (360.8 per 100,000 population).
The vast majority of notifications were recorded in Alice Springs District (114 out of 159, or 71%, see Table 1.4), which gave a high rate of 577.9 per 100,000 population. Further analysis showed that about 70% of Alice Springs notifications were from rural areas where the rate was 1,259.4 per 100,000 population.
The annualised notification rate was highest in the age groups of 15-19 and 20-24 years (representing 54% of all syphilis cases, see Table 1.6), although the rate difference between these age groups and others was not as great as that for gonorrhoea and chlamydia.
There were 4 cases of congenital syphilis notified in this reporting period.
B.4 Trichomoniasis
In this reporting period, 535 notifications of Trichomoniasis were recorded, compared with 365 cases in the same period of 2005 − a 47% increase (Table 1.1). The majority (98%) of all notifications were female (Table 1.2) and 90% were Aboriginal (Table 1.3).
About 40% of all notifications were recorded in the Alice Springs district with 28% and 22%
in Darwin and East Arnhem District respectively (Table 1.4). East Arnhem recorded the highest rate of 1,639.9 per 100,000 population, followed by 1,059.4 per 100,000 in Alice Springs.
3 This includes all categories of syphilis except congenital syphilis.
As shown in Table 1.5, both the disease burden and the notification rate were substantially higher in rural areas than in urban area.
The highest rate was recorded in the age groups 15-19 years and 20-24 years (Table 1.6).
Interpretation of trend analysis of trichomoniasis is difficult due to variations in the notification practice by different pathology laboratories. The recent implementation of standardised testing and reporting guidelines 2006 is expected to improve data quality.
B.5 Donovanosis
One case of donovanosis was notified in the NT in this reporting period, compared with 3 in the same period of 2005.
B.6 Other Sexually Transmitted Infections
There were no notifications of chancroid or lymphogranuloma venereum in this reporting period.
B.7 Hepatitis C
There were 153 new notifications of hepatitis C in this reporting period (Table 2.1). This figure is consistent with an existing increasing trend seen in the last 5 years (Figure 2.1).
The male rate was more than double the female rate, and the vast majority were non- Aboriginal (74.5%, see Table 2.1 and 2.2). Darwin district accounted for 71.9% of all notifications, followed by Alice Springs (20.2%, see Table 2.3). Moreover, the annualised notification rates for both Darwin and Alice Springs were substantially higher than the national rate (70.2 per 100,000 in 2004). The highest rates were seen in the 40-44 and 45-49 years age groups (Figure 2.2).
As shown in Table 2.2, 98.7% of all notifications were categorised as ‘unspecified’. For these notifications, it is difficult to know whether they have acquired the infection recently in the NT or have carried the infection for years under basic surveillance system. Therefore, enhanced surveillance for hepatitis C has been implemented from 1st of July, 2006. It is hoped that the collection and analysis of enhanced data will improve the understanding of the epidemiology of hepatitis C in the NT.
B.8 Human Immunodeficiency Virus (HIV)
Seven HIV cases were notified in this reporting period, three of whom were not NT residents.
Among the remaining four, three contracted the disease through heterosexual contact and one via homosexual contact. One of the four was female and all four were non-Aboriginal.
B.9 Acquired Immunodeficiency Syndrome (AIDS)
There were two notifications of AIDS in this 6-month period in the NT. Both were NT residents, male, and non-Aboriginal. One contracted the disease via heterosexual contact while the other through homosexual contact.
C. Surveillance of antibiotic sensitivity of N.
gonorrhoeae in the NT, 2005
In this issue, we continue our annual reporting of the surveillance of antibiotic sensitivity of Neisseria gonorrhoeae in the NT. The results for the year 2005 are presented here. For a detailed description of the significance of this surveillance system and current practice, please refer to the July-December 2004 issue of this publication.
The aggregated 2005 NT data from the three reference laboratories, i.e. Institute for Medical and Veterinary Science (IMVS) in South Australia (for isolates from Central Australia), Prince of Wales Hospital (POW) in NSW (for isolates from Royal Darwin Hospital
laboratory), and Royal Perth Hospital (RPH) in Western Australia (for isolates from Western Diagnostics laboratory), are presented below.
A total of 646 isolates originating from the NT were sent to the three reference laboratories in 2005, but only 618 (95.7%) were viable. Only 1 isolate (0.2%) was found to be fully sensitive to penicillin (MIC ≤ 0.03mg/L), while the vast majority (596, 96.4%) were less sensitive (MIC 0.06-05mg/L). Among the rest, 6 cases (1.0 %) were relatively resistant (MIC 1-2mg/L) and 15 (2.4%)were penicillinase-producing N. gonorrhoeae (PPNG, MIC >2mg/L), compared to 4.0 % of PPNG in 2004. Importantly, no PPNG isolate has been recorded in Central
Australia so far, where the gonorrhoea rates have remained extremely high.
All 191 isolates from Central Australia (accounting for 30.9% of 618 isolates) were found to be less sensitive to penicillin (see Table C.1 and Figure C.1). In the Top End, only 94.8% of isolates were less sensitive while 1.4% were relatively resistant and 3.5% PPNG. Only one isolate (0.2%) from the Top End was fully sensitive to penicillin.
In addition to sensitivity to Penicillin, examinations of sensitivity to Ciprofloxacin,
Tetracycline, Ceftriaxone and Spectinomycin are routinely performed. All 2005 isolates from NT were sensitive to Ceftriaxone, the antibiotic recommended for those acquire the disease from overseas or interstate. Fourteen isolates were resistant to Ciprofloxacin and 17 isolates resistant to Tetracycline. All these resistant isolates were from the Top End.
Fig. C.1 Statistics of penicillin sensitivity for N. Gonorrhoeae isolates from the NT, 2005
0 15
191
0 0
0 100 200 300 400 500
Sensitive Less Sensitive Relatively Resistant
PPNG
Number of Isolates
Top End Central Australia
1
405
6
Table C.1 Penicillin Sensitivity for N. Gonorrhoeae Isolates from the NT, 2005, by Region and Laboratory
Sensitivity Top End % Central Australia* %
Total %
Sensitive 1 0.2% 0 1 0.2%
Less Sensitive 405 94.8% 191 100.0% 596 96.4%
Relatively Resistant 6 1.4% 0 6 1.0%
PPNG 15 3.5% 0 15 2.4%
Total 427 191 618 100.0%
* Including Tennant Creek and Alice Springs.
The NT PPNG Database maintained by Sexual Health and Blood Borne Viruses Unit showed that, among the 15 PPNG cases in 2005, only two were acquired locally (in Darwin) from sex with overseas tourists; all other cases were either Indonesian Fishermen or NT residents who acquired the infection in South East Asian countries.
D. Consumer response
The Sexual Health and BBV Unit is very interested in readers’ responses to this report. Please forward any comments or suggestions to:
Surveillance Project Officer Head of Sexual Health and BBV Unit
Jiunn-yih Su Wendy Armstrong
Sexual Health and BBV Unit, Centre for Disease Control
Department of Health and Community Services PO Box 40596, Casuarina
Northern Territory Phone: (08) 89228874 Fax: (08) 8922 8809
Email: [email protected], [email protected]
All data in this report are provisional and subject to future revision.
This report is downloadable in PDF format from the Department of Health and Community Services website:
http://www.health.nt.gov.au/
Suggested citation:
Sexual Health and Blood Borne Viruses Unit Surveillance Update, Department of Health and Community Services, NT, 2006; Vol. 7, No. 1.
Tables and Figures:
1. Sexually transmissible infections (STIs)
Table 1.1 Number and rate of gonorrhoea, chlamydia, syphilis and trichomoniasis notifications, NT, Jan-Jun, 2005-2006
Gonorrhoea Chlamydia Syphilis Trichomoniasis Quarter
Cases Rate Cases Rate Case Rate Case Rate 2006
Jan-Mar 487 950.4 567 1106.5 66 128.8 262 511.3 Apr-Jun 526 1026.5 528 1030.4 93 181.5 273 532.8 Total 1013 988.5 1095 1068.5 159 155.2 535 522.0 2005
Jan-Mar 444 876.0 382 753.7 45 88.8 167 329.5 Apr-Jun 551 1087.1 476 939.2 74 146.0 198 390.7 Total 995 981.6 858 846.4 119 117.4 365 360.1
Figure 1.1 Notification rate of gonorrhoea, chlamydia, syphilis and trichomoniasis, NT, Jan-Jun, 2000-2006
0 200 400 600 800 1000 1200
Gonorrhoea Chlamydia Syphilis Trichomoniasis Cases per 100,000
population 2000 2001 2002 2003 2004 2005 2006
Table 1.2 Number and rate of gonorrhoea, chlamydia, syphilis and trichomoniasis notifications by gender, NT, Jan-Jun, 2005-2006
Gonorrhoea Chlamydia Syphilis Trichomoniasis Gender
Cases Rate Cases Rate Cases Rate Cases Rate Jan-Jun, 2006
Males
Jan-Mar 228 854.5 209 783.3 33 123.7 7 26.2 Apr-Jun 268 1004.4 223 835.7 36 134.9 4 15.0 Total 496 929.4 432 809.5 69 129.3 11 20.6 Females
Jan-Mar 259 1054.7 358 1457.8 33 134.4 255 1038.4 Apr-Jun 258 1050.6 305 1242.0 57 232.1 269 1095.4 Total 517 1052.7 663 1349.9 90 183.2 524 1066.9 Jan-Jun, 2005
Males 486 918.9 298 563.5 71 134.2 3 5.7 Females 509 1049.9 560 1155.1 48 99.0 362 746.7
Figure 1.2 Notification rate of gonorrhoea, chlamydia, syphilis and trichomoniasis by gender, NT, Jan-Jun, 2005-2006
0 200 400 600 800 1000 1200 1400 1600
Gonorrhoea Chlamydia Syphilis Trichomoniasis Cases per 100,000
population
Male Jan-Jun, 2005 Female Jan-Jun, 2005 Male Jan-Jun, 2006 Female Jan-Jun, 2006
Table 1.3 Number and rate of gonorrhoea, chlamydia, syphilis and trichomoniasis notifications by indigenous status, NT, Jan-Jun, 2005-2006
Ethnicity Gonorrhoea Chlamydia Syphilis Trichomoniasis Quarter Cases Rate Cases Rate Cases Rate Cases Rate
Aboriginal
Jan-Mar 419 2919.0 344 2396.5 60 418.0 243 1692.9 Apr-Jun 463 3225.5 362 2521.9 90 627.0 239 1665.0 Total 882 3072.3 706 2459.2 150 522.5 482 1678.9 Non-Aboriginal
Jan-Mar 37 100.3 166 450.0 4 10.8 9 24.4 Apr-Jun 41 111.2 127 344.3 2 5.4 23 62.4 Total 78 105.7 293 397.2 6 8.1 32 43.4 Unknown
Jan-Mar 31 57 2 10
Apr-Jun 22 39 1 11
Total 53 96 3 21 Jan-Jun, 2005
Aboriginal 875 3035.9 567 1967.2 104 360.8 335 1162.3 Non-Aboriginal 86 118.5 230 317.0 11 15.2 16 22.1
Unknown 34 61 4 14
Figure 1.3 Notification rate of gonorrhoea, chlamydia, syphilis and trichomoniasis by Indigenous status, NT, Jan-Jun, 2005-2006
0 500 1000 1500 2000 2500 3000 3500
Gonorrhoea Chlamydia Syphilis Trichomoniasis Cases per 100,000
population
Aboriginal Jan-Jun, 2005 Non-Aboriginal Jan-Jun, 2005 Aboriginal Jan-Jun, 2006 Non-Aboriginal Jan-Jun, 2006
Table 1.4 Number and rate of gonorrhoea, chlamydia, syphilis and trichomoniasis notifications by district, NT, Jan-Jun 2006
Gonorrhoea Chlamydia Syphilis Trichomoniasis District Cases Rate Cases Rate Cases Rate Cases Rate Darwin
Jan-Mar 113 354.4 238 746.5 11 34.5 63 197.6 Apr-Jun 94 294.9 175 548.9 6 18.8 88 276.0 Total 207 324.6 413 647.7 17 26.7 151 236.8 Katherine
Jan-Mar 42 912.4 42 912.4 7 152.1 20 434.5 Apr-Jun 40 869.0 33 716.9 5 108.6 23 499.7 Total 82 890.7 75 814.7 12 130.3 43 467.1 East Arnhem
Jan-Mar 38 1065.2 57 1597.9 8 224.3 59 1653.9 Apr-Jun 34 953.1 32 897.0 6 168.2 58 1625.9 Total 72 1009.2 89 1247.5 14 196.2 117 1639.9 Barkly
Jan-Mar 12 905.0 13 980.4 2 150.8 8 603.3 Apr-Jun 9 678.7 1 75.4 0 0.0 7 527.9 Total 21 791.9 14 527.9 2 75.4 15 565.6 Alice Springs
Jan-Mar 282 2859.0 217 2200.0 38 385.2 112 1135.5 Apr-Jun 349 3538.2 287 2909.6 76 770.5 97 983.4 Total 631 3198.6 504 2554.8 114 577.9 209 1059.4
Figure 1.4 Notifications rate of gonorrhoea, chlamydia, syphilis and trichomoniasis by district, Jan-Jun 2006
0 500 1000 1500 2000 2500 3000 3500
Darwin Katherine East Arnhem Barkly Alice Springs Cases per 100,000
population Gonorrhoea Chlamydia Syphillis Trichomoniasis
Table 1.5 Number and rate of gonorrhoea, chlamydia syphilis and trichomoniasis notifications by urban and rural split, Darwin and Alice Springs, Jan-Jun 2006
Gonorrhoea Chlamydia Syphilis Trichomoniasis District Cases Rate Cases Rate Cases Rate Cases Rate Darwin Urban
Jan-Mar 68 239.7 197 694.6 8 28.2 21 74.0 Apr-Jun 60 211.5 142 500.6 2 7.1 29 102.2
Total 128 225.6 339 597.6 10 17.6 50 88.1 Darwin Rural
Jan-Mar 40 1137.3 34 966.7 3 85.3 34 966.7 Apr-Jun 31 881.4 29 824.5 4 113.7 57 1620.6 Total 71 1009.3 63 895.6 7 99.5 91 1293.6 Alice Springs Urban
Jan-Mar 126 1895.3 112 1684.7 17 25.6 24 361.0 Apr-Jun 111 1669.7 92 1383.9 12 18.1 21 315.9
Total 237 1782.5 204 1534.3 29 21.8 45 338.4 Alice Springs Rural
Jan-Mar 118 3669.4 87 2705.4 21 653.0 63 1959.1 Apr-Jun 221 6872.4 185 5752.9 60 1865.8 60 1865.8 Total 339 5270.9 272 4229.2 81 1259.4 123 1912.5
Figure 1.5 Notification rate of gonorrhoea, chlamydia syphilis and trichomoniasis by Urban and Rural split, Darwin and Alice Springs, Jan-Jun 2006
0 1000 2000 3000 4000 5000 6000
Darwin Urban Darwin Rural Alice Springs Urban Alice Springs Rural Cases per
100,0000 population
Gonorrhoea Chlamydia Syphillis Trichomoniasis
Table 1.6 Number and rate of gonorrhoea, chlamydia, syphilis and trichomoniasis notifications by five-year age group, NT, Jan-Jun 2006
Gonorrhoea Chlamydia Syphilis Trichomoniasis Age group Cases Rate Cases Rate Cases Rate Cases Rate Jan-Jun 2006
0-4 1 11.2 0 0.0 0 0.0 0 0.0
5-9 2 23.7 0 0.0 0 0.0 0 0.0
10-14 39 475.8 32 390.4 11 134.2 11 134.2 15-19 236 3129.8 310 4111.1 53 702.9 114 1511.8 20-24 269 3311.0 338 4160.3 33 406.2 103 1267.8 25-29 169 1960.6 178 2065.0 20 232.0 87 1009.3 30-34 120 1346.1 106 1189.1 15 168.3 71 796.5 35-39 76 872.0 53 608.1 5 57.4 56 642.5 40-44 49 609.7 37 460.4 5 62.2 40 497.7 45-49 27 369.5 16 219.0 4 54.7 31 424.3 50-54 13 201.6 15 232.6 3 46.5 9 139.5
55-59 6 113.6 4 75.8 2 37.9 8 151.5
60-64 2 60.3 3 90.5 4 120.7 4 120.7
65+ 4 86.0 3 64.5 4 86.0 1 21.5
Total 1013 988.5 1095 1068.5 159 155.2 535 522.0
Figure 1.6 Age-specific notification rate of gonorrhoea, chlamydia, syphilis and trichomoniasis, Jan-Jun 2006
0 500 1000 1500 2000 2500 3000 3500 4000 4500
0-4 5-9 10- 14
15- 19
20- 24
25- 29
30- 34
35- 39
40- 44
45- 49
50- 54
55- 59
60- 64
65+
Case per 100,000
population Gonorrhoea Chlamydia Syphilis Trichomoniasis
2. Hepatitis C
Table 2.1 Number and rate of hepatitis C notifications by gender and indigenous status, NT, Jan-Jun 2006
Quarter Gender Aboriginal Non-Aboriginal Unknown Total Case Rate Case Rate Case Case Rate
Jan-Mar Female 3 41.5 20 115.4 6 29 118.1
Male 5 70.2 46 235.2 12 63 236.1
Total 8 55.7 66 178.9 18 92 179.5
Apr-Jun Female 2 27.7 12 69.3 2 16 65.2
Male 5 70.2 36 184.1 4 45 168.6
Total 7 48.8 48 130.1 6 61 119.0
Jan-Jun Female 5 34.6 32 92.3 8 45 91.6
Male 10 70.2 82 209.6 16 108 202.4
Total 15 52.2 114 154.5 24 153 149.3
Figure 2.1 Number of hepatitis C notifications, NT, Jan-Jun, 2000-2006
0 20 40 60 80 100 120 140 160 180
2000 2001 2002 2003 2004 2005 2006
Number of notifications
Female Male
Table 2.2 Number of hepatitis C notifications by hepatitis category, indigenous status and sex, NT, Jan-Jun 2006
Type Gender Indigenous status Total Percentage Aboriginal Non-
Aboriginal Unknown Case %
Chronic Female 0 1 0 1 0.7%
New Male 0 1 0 1 0.7%
Female 5 31 8 44
Unspecified
Male 10 81 16 107 98.7%
Total 15 114 24 153 100.0%
Table 2.3 Number and rate of hepatitis C notifications by sex and district, NT, Jan-Jun 2006
District
Darwin Katherine East Arnhem Barkly Alice Springs Quarter Gender
Case Rate Case Rate Case Rate Case Rate Case Rate Jan-Mar Female 20 132.0 2 91.8 0 0.0 1 156.5 6 123.7 Male 48 287.0 5 206.3 0 0.0 0 0.0 10 199.4 Apr-Jun Female 13 85.8 1 45.9 0 0.0 0 0.0 2 41.2 Male 29 173.4 0 0.0 0 0.0 1 145.6 13 259.2
Jan-Jun 2006
Female 33 108.9 3 68.8 0 0.0 1 78.2 8 82.5 Male 77 230.2 5 103.2 0 0 1 72.78 23 229.3 Total 110 172.5 8 86.9 0 0.0 2 75.4 31 153.6
Table 2.4 Number and rate of hepatitis C notifications by sex and 5-year age group, NT, Jan- Jun 2006
Age
group Female Male Total
Case Rate Case Rate Case Rate
0-4 0 0.0 0 0.0 0 0.0
5-9 0 0.0 0 0.0 0 0.0
10-14 0 0.0 0 0.0 0 0.0
15-19 0 0.0 2 50.7 2 26.5
20-24 3 76.7 7 166.1 10 123.1 25-29 10 243.5 9 199.4 19 220.4 30-34 6 136.6 16 353.9 22 246.8 35-39 4 93.8 12 269.6 16 183.6 40-44 7 181.3 22 527.0 29 360.9 45-49 8 225.3 18 479.4 26 355.8 50-54 6 195.8 14 413.5 20 310.1 55-59 1 41.3 5 174.9 6 113.6
60+ 0 0.0 3 68.6 3 37.6
Total 45 91.6 108.0 202.4 153 149.3
Figure 2.2 Age-specific rate of hepatitis C notification by sex, Jan-Jun 2006
0 100 200 300 400 500
15-19 20-24 25-29 30-34 35-39 40-44 45-49 50-54 55-59 60+
Age group Annualised
notification rate (per 100,000 population)
Female Male All
