Surveillance Update

(1)

for Notifiable Sexually Transmitted Infections and

Blood-Borne Viruses in the Northern Territory

Vol. 17, No. 4 October to December 2016

Centre for Disease Control

Department of Health

Northern Territory Government

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Page 2 Surveillance Update for Notifiable STIs and BBVs in the NT. Vol. 17(4), Oct-Dec 2016

The notification data used in this report were extracted from the Northern Territory Notifiable Diseases System (NTNDS) on the 10

^th

March 2016. Unless specified otherwise, all STI data are for genital infections. Notifications with a non-NT residential address were excluded from the report.

Other data used in this report include enhanced surveillance data for infectious syphilis from the NT Syphilis Register Information System, HIV notification data from the HIV/AIDS database maintained by the Sexual Health and Blood Borne Viruses Unit (SHBBVU). Population data used in rate calculation are estimated resident population prepared and provided by the Health Gains Planning unit (updated in 2014), which were derived from Census data retrieved from the Australian Bureau of Statistics. All rates for 2016 were calculated using population data for 2014 because the population data for 2015 were not available at the time of the report writing.

All surveillance data of the NT presented in this report are provisional and subject to future revision. The quarterly rates of notification presented in this report are all crude annualised rates per 100,000 population. Where appropriate, the five-year mean of the corresponding numbers of notifications for 2011-2015 are also presented for comparison purposes.

The revised national case definition for infectious syphilis (or syphilis of less than two

years’ duration) was implemented by the federal Department of Health on 1 July

2015. The NT also adopted this new case definition on the same day. Therefore, the

data for infectious syphilis for this quarter contain notifications under both confirmed

and probable categories. We have also reported data for the two categories in a

separate table (Table E.5).

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B. Chlamydia

Figure B.1 Quarterly number and annualised rate (per 100,000 population) of chlamydia notifications in the NT, 2011-2016 (Q4)

Table B.1 Number of chlamydia notifications in the NT by age group, Oct-Dec, 2016

Age group

Prior 5-year mean for Oct-

Dec quarter (2011-2015) Oct-Dec 2016 Increase over prior 5-year

mean Number Proportion Number Proportion

<10 1.0 0.1% 0 0.0% -100.0%

10-14 19.8 2.9% 17 2.6% -14.1%

15-19 180.0 26.5% 185 28.2% 2.8%

20-24 199.4 29.3% 194 29.6% -2.7%

25-29 131.0 19.3% 121 18.5% -7.6%

30-34 66.4 9.8% 56 8.5% -15.7%

35-39 33.4 4.9% 31 4.7% -7.2%

40-44 21.8 3.2% 30 4.6% 37.6%

45-49 11.6 1.7% 7 1.1% -39.7%

50-54 9.4 1.4% 7 1.1% -25.5%

55-59 4.4 0.6% 3 0.5% -31.8%

60+ 1.8 0.3% 4 0.6% 122.2%

Total 680.0 655 -3.7%

Table B.2 Number of chlamydia notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

391.6 57.6% 383 63.8% -2.2%

Male

_288.4 _42.4% ₂₇₂ _45.3% _-5.7%

Total 680.0 655

_-3.7%

0 200 400 600 800 1000 1200 1400

0 200 400 600 800 1,000

Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec Jan-Mar Apr-Jun Jul-Sep Oct-Dec

2012 2013 2014 2015 2016

Annualised notification rate

Number of notifications

No. of notifications Annualised notification rate per 100,000

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Table B.3 Number of chlamydia notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

_386.0 _56.8% ₃₉₆ _60.5% _2.6%

Non-Aboriginal

241.6 35.5% 204 31.1% -15.6%

Unknown

_52.4 _7.7% ₅₅ _8.4% _5.0%

Total 680.0 655 -3.7%

Table B.4 Number of chlamydia notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs Rural

87.0 12.8% 104 15.9%

19.5%

Alice Springs Urban

98.0 14.4% 107 16.3%

9.2%

Barkly

20.8 3.1% 19 2.9%

-8.7%

Darwin Rural

49.2 7.2% 49 7.5%

-0.4%

Darwin Urban

293.4 43.1% 256 39.1%

-12.7%

East Arnhem

45.8 6.7% 39 6.0%

-14.8%

Katherine

85.6 12.6% 81 12.4%

-5.4%

Total 680.0 655

_-3.7%

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C. Gonorrhoea

Figure C.1 Quarterly number and annualised rate (per 100,000 population) of gonorrhoea notifications in the NT, 2011-2016 (Q4)

Table C.1 Number of gonorrhoea notifications in the NT by age group, Oct-Dec, 2016

Age group

Prior 5-year mean for Oct- Dec

quarter (2011-2015) Oct-Dec 2016 Increase over prior 5-year

<10 1.6 0.4% 0 0.0% -100.0%

10-14 24.2 5.4% 26 6.1% 7.4%

15-19 115.6 25.8% 135 31.6% 16.8%

20-24 100.8 22.5% 89 20.8% -11.7%

25-29 80.2 17.9% 52 12.2% -35.2%

30-34 56.2 12.6% 48 11.2% -14.6%

35-39 29.0 6.5% 32 7.5% 10.3%

40-44 19.2 4.3% 26 6.1% 35.4%

45-49 10.8 2.4% 8 1.9% -25.9%

50-54 3.8 0.8% 4 0.9% 5.3%

55-59 3.6 0.8% 1 0.2% -72.2%

60+ 2.6 0.6% 6 1.4% 130.8%

Total 447.6 427 -4.6%

Table C.2 Number of gonorrhoea notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

_242.8 _54.2% ₂₁₁ _49.4% _-13.1%

Male

204.8 45.8% 216 50.6% 5.5%

Total 447.6 427

-4.6%

0 200 400 600 800 1000

0 100 200 300 400 500 600

2012 2013 2014 2015 2016

Annualised notification rate

(7)

Table C.3 Number of gonorrhoea notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

403.2 90.1% 390 91.3% -3.3%

Non-Aboriginal

38.0 8.5% 33 7.7% -13.2%

Unknown

6.4 1.4% 4 0.9% -37.5%

Total 447.6 427 -4.6%

Table C.4 Number of gonorrhoea notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs Rural

125.0 27.9% 83 19.4%

-33.6%

Alice Springs Urban

94.6 21.1% 102 23.9%

7.8%

Barkly

20.4 4.6% 28 6.6%

37.3%

Darwin Rural

31.2 7.0% 37 8.7%

18.6%

Darwin Urban

62.0 13.9% 54 12.6%

-12.9%

East Arnhem

25.0 5.6% 34 8.0%

36.0%

Katherine

89.2 19.9% 89 20.8%

-0.2%

Unknown

0.2 <1.0% 0 0.0%

-

Total 447.6 427

-4.6%

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D. Trichomoniasis

Figure D.1 Quarterly number and annualised rate (per 100,000 population) of trichomoniasis notifications in the NT, 2011-2016 (Q4)

Table D.1 Number of trichomoniasis notifications in the NT by age group, Oct-Dec, 2016

Age group

<10 0.4 0.1% 0 0.0% -100.0%

10-14 26.8 3.4% 31 3.2% 15.7%

15-19 140.6 17.7% 189 19.5% 34.4%

20-24 140.6 17.7% 153 15.8% 8.8%

25-29 126.0 15.8% 136 14.0% 7.9%

30-34 99.6 12.5% 122 12.6% 22.5%

35-39 83.4 10.5% 91 9.4% 9.1%

40-44 79.4 10.0% 94 9.7% 18.4%

45-49 52.6 6.6% 73 7.5% 38.8%

50-54 21.6 2.7% 41 4.2% 89.8%

55-59 12.4 1.6% 13 1.3% 4.8%

60+ 12.4 1.6% 27 2.8% 117.7%

Total 795.8 970 21.9%

Table D.2 Number of trichomoniasis notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

_673.4 _84.6% ₈₁₅ _84.0% _21.0%

Male

122.4 15.4% 155 16.0% 26.6%

Total 795.8 970

21.9%

0 500 1000 1500 2000

0 200 400 600 800 1,000 1,200

2012 2013 2014 2015 2016

Annualised notification rate

(9)

Table D.3 Number of trichomoniasis notifications in the NT by Aboriginal status, Oct- Dec, 2016

Aboriginal status

Aboriginal

_755.6 _94.9% ₉₃₇ _96.6% _24.0%

Non-Aboriginal

20.2 2.5% 26 2.7% 28.7%

Unknown

_20.0 _2.5% ₇ _0.7% _-65.0%

Total 795.8 970 21.9%

Table D.4 Number of trichomoniasis notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs

Rural

122.4 15.4% 125 12.9%

_2.1%

Alice Springs

Urban

88.8 11.2% 115 11.9%

_29.5%

Barkly

45.2 5.7% 43 4.4%

-4.9%

Darwin Rural

157.0 19.7% 215 22.2%

36.9%

Darwin Urban

98.6 12.4% 127 13.1%

28.8%

East Arnhem

132.4 16.6% 159 16.4%

20.1%

Katherine

150.8 18.9% 185 19.1%

22.7%

Total 795.8 970

_21.9%

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E. Infectious syphilis

Figure E.1 Quarterly number and annualised rate (per 100,000 population) of infectious syphilis notifications in the NT, 2011-2016 (Q4)

Table E.1 Number of infectious syphilis notifications in the NT by age group, Oct-Dec, 2016

Age group

Dec quarter (2011-2015) Oct-Dec 2016 Increase over prior 5-year mean Number Proportion Number Proportion

<10 0.0 0.0% 0 0.0% -

10-14 1.2 6.3% 5 6.7% 316.7%

15-19 6.6 34.4% 21 28.0% 218.2%

20-24 4.2 21.9% 16 21.3% 281.0%

25-29 1.8 9.4% 17 22.7% 844.4%

30-34 1.4 7.3% 5 6.7% 257.1%

35-39 1.2 6.3% 1 1.3% -16.7%

40-44 1.0 5.2% 6 8.0% 500.0%

45-49 0.8 4.2% 2 2.7% 150.0%

50-54 0.4 2.1% 1 1.3% -

55-59 0.2 1.0% 1 1.3% -

60+ 0.4 2.1% 0 0.0% -100.0%

Total 19.2 75 290.6%

Table E.2 Number of infectious syphilis notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

8.2 42.7% 38 50.7% 363.4%

Male

11.0 57.3% 37 49.3% 236.4%

Total 19.2 75

290.6%

0 20 40 60 80 100 120 140

0 1020 30 4050 60 70 80

2012 2013 2014 2015 2016

Annualised notification rate

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Table E.3 Number of infectious syphilis notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

_17.0 _88.5% ₆₇ _89.3% _294.1%

Non-Aboriginal

2.2 11.5% 8 10.7% 263.6%

Total 19.2 75 290.6%

Table E.4 Number of infectious syphilis notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs

Rural

2.8 14.6% 5 6.7%

_78.6%

Alice Springs

Urban

2.8 14.6% 4 5.3%

_42.9%

Barkly

1.6 8.3% 0 0.0%

-100.0%

Darwin Rural

0.4 2.1% 7 9.3%

1650.0%

Darwin Urban

2.4 12.5% 16 21.3%

566.7%

East Arnhem

1.2 6.3% 1 1.3%

-16.7%

Katherine

8.0 41.7% 42 56.0%

425.0%

Total 19.2 75

290.6%

Table E.5 Number of infectious syphilis notifications in the NT by confirmed category, sex and Aboriginal status, Oct-Dec, 2016

Category Confirmed Probable Total %

Total 65 10 75

Proportion 86.7% 13.3%

Sex

Female 32 6 38 50.7%

Male 33 4 37 49.3%

Aboriginal status

Aboriginal 59 8 67 89.3%

Non-Aboriginal 6 2 8 10.7%

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F. Hepatitis B virus infection

Figure F.1 Quarterly number and annualised rate (per 100,000 population) of hepatitis B notifications in the NT, 2011-2016 (Q4)

Table F.1 Number of hepatitis B notifications in the NT by age group, Oct-Dec, 2016

Age group

<10 0.2 0.4% 0 0.0% -

10-14 0.2 0.4% 0 0.0% -100.0%

15-19 4.0 7.0% 0 0.0% -100.0%

20-24 6.8 12.0% 2 9.1% -70.6%

25-29 10.2 18.0% 1 4.5% -90.2%

30-34 8.8 15.5% 3 13.6% -65.9%

35-39 6.0 10.6% 4 18.2% -33.3%

40-44 5.4 9.5% 5 22.7% -7.4%

45-49 3.6 6.3% 2 9.1% -44.4%

50-54 4.8 8.5% 0 0.0% -100.0%

55-59 3.0 5.3% 0 0.0% -100.0%

60+ 3.8 6.7% 5 22.7% 31.6%

Total 56.8 22 -61.3%

Table F.2 Number of hepatitis B notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

21.2 37.3% 10 45.5% -52.8%

Male

35.6 62.7% 12 54.5% -66.3%

Total 56.8 22

-61.3%

0 50 100 150 200 250 300

0 50 100 150 200

2012 2013 2014 2015 2016

Annualised notification rate

(13)

Table F.3 Number of hepatitis B notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

25.2 44.4% 8 36.4% -68.3%

Non-Aboriginal

^29.0 ^51.1% ¹³ ^59.1% ^-55.2%

Unknown

3.3 5.7% 1 4.5% -69.2%

Total 56.8 22 -61.3%

Table F.4 Number of hepatitis B notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs

Rural

4.6 8.1% 0 0.0%

_-100.0%

Alice Springs

Urban

4.8 8.5% 0 0.0%

_-100.0%

Barkly

2.8 4.8% 0 0.0%

_-100.0%

Darwin Rural

6.0 10.6% 1 4.5%

-83.3%

Darwin Urban

31.4 55.3% 17 77.3%

_-45.9%

East Arnhem

7.0 12.3% 2 9.1%

-71.4%

Katherine

2.8 4.8% 2 9.1%

_-27.3%

Total

56.8 22

_-61.3%

(14)

G. Hepatitis C virus infection

Figure G.1 Quarterly number and annualised rate (per 100,000 population) of hepatitis C notifications in the NT, 2011-2016 (Q4)

Table G.1 Number of hepatitis C notifications in the NT by age group, Oct-Dec, 2016

Age group

<10 0.0 0.0% 0 0.0% -

10-14 0.0 0.0% 0 0.0% -

15-19 1.0 1.7% 0 0.0% -100.0%

20-24 4.4 7.7% 1 1.9% -77.3%

25-29 5.8 10.1% 5 9.4% -13.8%

30-34 7.4 12.9% 9 17.0% 21.6%

35-39 8.0 14.0% 11 20.8% 37.5%

40-44 7.2 12.6% 7 13.2% -2.8%

45-49 7.4 12.9% 8 15.1% 8.1%

50-54 7.0 12.2% 6 11.3% -14.3%

55-59 6.6 11.5% 3 5.7% -54.5%

60+ 2.4 4.2% 3 5.7% 25.0%

Total 57.2 53 -7.3%

Table G.2 Number of hepatitis C notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

14.6 25.5% 21 39.6% 43.8%

Male

42.6 74.5% 32 60.4% -24.9%

Total 57.2 53

-7.3%

0 20 40 6080 100 120 140 160

0 20 40 60 80 100

2012 2013 2014 2015 2016

Annualised notification rate

(15)

Table G.3 Number of hepatitis C notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

9.8 17.1% 9 17.0% -8.2%

Non-Aboriginal

44.0 76.9% 34 64.2% -22.7%

Unknown

3.4 5.9% 10 18.9% 194.1%

Total 57.2 53 -7.3%

Table G.4 Number of hepatitis C notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs

Rural

0.2 0.3% 1 1.9%

_400.0%

Alice Springs

Urban

6.8 11.9% 9 17.0%

_32.4%

Barkly

0.2 0.3% 1 1.9%

_400.0%

Darwin Rural

2.8 4.9% 2 3.8%

-28.6%

Darwin Urban

42.8 74.8% 34 64.2%

_-20.6%

East Arnhem

1.4 2.4% 1 1.9%

-28.6%

Katherine

3.0 5.2% 5 9.4%

_66.7%

Total

57.2 53

_-7.3%

(16)

H. HIV

Figure H.1 Quarterly number and annualised rate (per 100,000 population) of HIV notifications in the NT, 2010-2015 (Q4)

Table H.1 Number of HIV notifications in the NT by age group, Oct-Dec, 2016

Age group

<10 0.0 0.0% 0 0.0% -

10-14 0.0 0.0% 0 0.0% -

15-19 0.6 9.7% 0 0.0% -100.0%

20-24 0.0 0.0% 2 22.2% -

25-29 0.6 9.7% 0 0.0% -100.0%

30-34 1.2 19.4% 3 33.3% 150.0%

35-39 1.0 16.1% 0 0.0% -100.0%

40-44 1.4 22.6% 1 11.1% -28.6%

45-49 0.4 6.5% 2 22.2% 400.0%

50-54 0.6 9.7% 0 0.0% -100.0%

55-59 0.0 0.0% 0 0.0% -

60+ 0.4 6.5% 1 11.1% 150.0%

Total 6.2 9 45.2%

Table H.2 Number of HIV notifications in the NT by sex, Oct-Dec, 2016

Sex

Female

1.6 25.8% 1 11.1% -37.5%

Male

^4.6 ^74.2% ⁸ ^88.9% ^73.9%

Total 6.2 9

^45.2%

0 5 10 15 20

0 2 4 6 8 10 12

2012 2013 2014 2015 2016

Annualised notification rate

(17)

Table H.3 Number of HIV notifications in the NT by Aboriginal status, Oct-Dec, 2016

Aboriginal status

Aboriginal

0.0 0.0% 1 11.1% -

Non-Aboriginal

^6.2 ^100.0% ⁸ ^88.9% ^29.0%

Unknown

0.0 0.0% 0 0.0% -

Total 6.2 9 45.2%

Table H.4 Number of HIV notifications in the NT by district, Oct-Dec, 2016

District

Alice Springs

Rural

0.0 0.0% 0 0.0%

-

Alice Springs

Urban

0.8 12.9% 0 0.0%

_-100.0%

Barkly

0.0 0.0% 0 0.0%

_-

Darwin Rural

0.0 0.0% 0 0.0%

-

Darwin Urban

5.4 87.1% 9 100.0%

_66.7%

East Arnhem

0.0 0.0% 0 0.0%

-

Katherine

0.0 0.0% 0 0.0%

_-

Total 6.2 9

_45.2%

Table H.5 Number of HIV notifications in the NT by exposure category, Oct-Dec, 2016

Exposure category Oct-Dec 2016

Number Proportion

Heterosexual 4 44.4%

Heterosexual & IDU 0 0.0%

IDU 0 0.0%

Gay/Bisexual men 2 22.2%

Gay/Bisexual men & IDU 2 22.2%

Other or unknown exposure 1 11.1%

Total 9

(18)

I. Readers’ responses

The SHBBVU is very interested in readers’ response/s to the report. Please forward any comments or suggestions to:

Surveillance Officer Head

Matthew O’Dwyer Dr Matthew Thalanany

E: [email protected] E: [email protected]

Address:

Sexual Health & Blood Borne Virus Unit Centre for Disease Control

Department of Health PO Box 40596

Casuarina, Northern Territory, 0811

Phone: 08.8922 7737 | Fax: 08.8922 8809

All data in this report are provisional and subject to future revision.

This report is downloadable in PDF from the following website:

http://digitallibrary.health.nt.gov.au/prodjspui/handle/10137/237

Suggested citation:

Northern Territory Department of Health. Surveillance Update for Notifiable Sexually Transmitted Infections and Blood-Borne Viruses in the Northern Territory. 2016; Vol.

17, No. 4.

Surveillance Update - NT Health Digital Library