National Notifiable Diseases Surveillance System - current CDNA fortnightly report

The Communicable Diseases Network Australia (CDNA) holds fortnightly teleconferences to share and evaluate the latest information and developments in communicable diseases surveillance. This report provides a fortnightly summary on diseases of current interest and notifications of Australia's nationally notifiable diseases.

Page last updated: 16 February 2017

Fortnight 03: 28 January to 10 February 2017

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Dengue Virus (DENV) infection

Between 28 January and 10 February 2017, there were 57 notifications of DENV, compared with 65 during the previous reporting period and 100 during the same period of 2016. There were 328 notifications during the past quarter, a ratio of 0.8 compared with the 5 year mean of 424.6 notifications.

While notifications were below the five year mean nationally, it should be noted that with outbreaks being reported in the Pacific in the Solomon Islands, Vanuatu and New Caledonia, there is the potential for increases in the number of imported cases from these areas. During the past fortnight, 13 cases were acquired in Indonesia, 11 in Vanuatu, 6 in Malaysia, and increases compared with the 5 year mean were noted for cases acquired in the Solomon Islands and Vanuatu (Table 1).

Table 1: Notifications of dengue virus infection, 13 November 2016 to 10 February 2017, and comparison to the 5 year mean1, by place of acquisition.

Place of acquisition
13 Nov 2016 to 10 Feb 2017
Quarterly rolling 5 year mean1
Ratio past quarter to the quarterly rolling 5 year mean
Indonesia
102
187.6
0.5
Solomon Islands
31
1.8
17.2
Thailand
31
43.2
0.7
Vanuatu
27
1.4
19.3
India
25
14.4
1.7
Philippines
14
20.4
0.7
Malaysia
12
18.2
0.7
Sri Lanka
12
16.2
0.7
Viet Nam
12
10.8
1.1
East Timor
6
6
1.0
Fiji
6
9.6
0.6
Cambodia
2
7.2
0.3
Papua New Guinea
2
4.4
0.5
Samoa
1
4.2
0.2
New Caledonia
1
0.4
2.5
Other countries
13
37.6
0.3
Overseas - Country Unknown
1
0.8
1.3
Australia
11
33.6
0.3
Unknown/not stated
19
6.8
2.8
Total
328
424.6
0.8

1 The rolling 5 year mean is calculated for the same period over the previous five years, and includes the periods: 13 Nov 2011 to 10 Feb 2012, 13 Nov 2012 to 10 Feb 2013, 13 Nov 2014 to 10 Feb 2015 and 13 Nov 2015 to 10 Feb 2016.

Influenza (laboratory confirmed)

Notifications of laboratory-confirmed influenza were almost 2.8 times higher in the past quarter (n=8,410) when compared to the quarterly rolling 5 year mean (n=3,020). Despite the larger number of notifications reported to the NNDSS when compared with the same period in previous years, influenza activity remains at inter-seasonal levels in Australia. Increased respiratory tests may be contributing to the rise in notifications of laboratory-confirmed influenza in the inter-seasonal period.1 The predominance of influenza A(H3N2) in notified cases of influenza so far this year is consistent with current activity in the northern hemisphere. Influenza-like illness presentations to sentinel general practitioners remain within the expected range for this time of year.

1 NSW Government Health Communicable Diseases (2017) Influenza Monthly Epidemiology Report, NSW January 2017. Available at: NSW Health Website, Accessed: 13 February 2017.

Invasive Meningococcal Disease (IMD)

The number of cases of IMD due to serogroup W (MenW) has been increasing across most jurisdictions in Australia since 2013. The Commonwealth Department of Health, in collaboration with the states and territories, is closely monitoring the incidence of MenW in Australia. For the latest information on IMD, refer to the Department’s website.

Ross River Virus (RRV)

Between 28 January and 10 February 2017, there were 571 notifications of RRV, compared with 555 during the previous reporting period and 168 during the same period of 2016. There were 2,136 notifications during the past quarter, a ratio of 1.7 compared with the 5 year mean of 1,248 notifications.

By state during the past quarter, the largest increases compared with the 5 year mean were in the ACT, NSW, SA and Vic, and the largest numbers were reported in NSW (623) and Vic (672) (Table 2). Case numbers increased dramatically from week 2 in 2017 in the most affected jurisdictions (Figure A).

The timing of the seasonal increase in RRV in the 2016-17 season is earlier than usual, with peak notifications nationally usually occurring between February and May.

Table 2. Notifications of Ross River virus infection 13 November 2016 to 10 February 2017, by state or territory, and comparison to the 5 year mean.

Period
ACT
NSW
NT
QLD
SA
TAS
VIC
WA
Total
Past quarter
11
623
38
255
211
4
672
322
2,136
Quarterly rolling 5 year mean
1.6
145.2
93.4
547.4
36.8
1.6
68.8
353.2
1,248
Ratio past quarter to the quarterly rolling 5 year mean1
6.9
4.3
0.4
0.5
5.7
2.5
9.8
0.9
1.7


Figure A: Notifications of Ross River virus infection, NNDSS, 13 November 2016 to 10 February 2017, by year and week number and state or territory.


Interpretative Notes

Selected diseases are chosen each fortnight based on either exceeding two standard deviations from the 90 day and/or 365 day five year rolling mean or other disease issues of significance identified during the reporting period. All diseases reported are analysed by notification receive date. Data are extracted each Monday of a CDNA week.

Totals comprise data from all States and Territories. Cumulative figures are subject to retrospective revision so there may be discrepancies between the number of new notifications and the increment in the cumulative figure from the previous period.

  1. The past quarter (90 day) surveillance period includes the date range 13/11/2016 to 10/02/2017.
  2. The quarterly (90 day) five year rolling mean is the average of 5 intervals of 90 days up to 10/02/2017. The ratio is the notification activity in the past quarter (90 days) compared with the five year rolling mean for the same period.
  3. The past year (365 day) surveillance period includes the date range 12/02/2016 to 10/02/2017.
  4. The yearly (365 day) five year rolling mean is the average of 5 intervals of 365 days up to 10/02/2017. The ratio is the notification activity in the past year (365 days) compared with the five year rolling mean for the same period.

The five year rolling mean and the ratio of notifications compared with the five year rolling mean should be interpreted with caution. Changes in surveillance practice, diagnostic techniques and reporting may contribute to increases or decreases in the total notifications received over a five year period. Ratios are to be taken as a crude measure of current disease activity and may reflect changes in reporting rather than changes in disease activity.


Table of communicable disease notifications reported to the NNDSS for this fortnight

Please use the scroll bar located at the end of the table below to view all columns.

A copy of the table of communicable disease notifications for this fortnight is also included in the PDF printable version of the NNDSS report.

Notifications of Nationally Notifiable Diseases for the period 28/01/2017 to 10/02/2017

Footnotes:

* Ratio of the 90 day prior surveillance period to the past 90 day 5 year rolling mean, or ratio of the 365 day prior surveillance period to the 365 day 5 year rolling mean.

NN = Not Notifiable, NEC = Not Elsewhere Classified

The data in this report is reliant on the surveillance data provided from by states and territories to the Department of Health. Delays in the reporting of data may cause retrospective revision causing discrepancies between the number of new notifications and the increment in the cumulative figures from the previous period. Please note that Victoria is currently experiencing an administrative backlog in the entry of notifications, this has affected the availability of notification data for the following diseases: Gonoccocal infection, Varicella and Campylobacteriosis.

 

Dates used are:

  • Past Quarter (90d prior surveillance period): 13/11/2016 to 10/02/2017
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean):
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean) 1: 13/11/2015 to 10/02/2016
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean) 2: 13/11/2014 to 10/02/2015
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean) 3: 13/11/2013 to 10/02/2014
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean) 4: 13/11/2012 to 10/02/2013
  • Quarterly rolling 5Yr Mean (90d 5Yr Mean) 5: 13/11/2011 to 10/02/2012
  • Past year (365d prior surveillance period): 12/02/2017 to 10/02/2017
  • Yearly rolling 5Yr Mean (365d 5Yr Mean):
  • Yearly rolling 5Yr Mean (365d 5Yr Mean) 1: 11/02/2015 to 10/02/2016
  • Yearly rolling 5Yr Mean (365d 5Yr Mean) 2: 11/02/2014 to 10/02/2015
  • Yearly rolling 5Yr Mean (365d 5Yr Mean) 3: 11/02/2013 to 10/02/2014
  • Yearly rolling 5Yr Mean (365d 5Yr Mean) 4: 12/02/2012 to 10/02/2013
  • Yearly rolling 5Yr Mean (365d 5Yr Mean) 5: 11/02/2011 to 10/02/2012
  State or Territory Totals for Australia Historical 90 Day Period Historical 365 Day Period
Disease ACT NSW NT QLD SA TAS VIC WA This
Reporting
Period
Previous
Reporting
Period
Same
Reporting
Period
Last Year
2017 YTD Past
Quarter
Quarterly
Rolling
5 year
mean
Ratio
Past
Quarter
/5 year
mean
Exceeds
Quarterly
rolling
mean +2
SD by
Past
Year
Yearly
rolling
5 year
mean
Ratio
Past
year
/5 year
mean
Exceeds
Yearly
rolling
mean +2
SD by
Bloodborne diseases
Hepatitis B (newly acquired) 0 2 0 3 0 0 1 0 6 3 8 14 32 41.2 0.8 - 150 173.8 0.9 -
Hepatitis B (unspecified) 0 91 0 44 2 1 48 18 204 240 254 620 1,378 1,461.4 0.9 - 6,365 6,468.8 1.0 -
Hepatitis C (newly acquired) 0 3 0 6 0 0 2 8 19 21 31 62 156 109.4 1.4 - 677 453.0 1.5         130.3
Hepatitis C (unspecified) 5 158 4 97 1 5 59 44 373 369 455 1,045 2,447 2,346.2 1.0 - 11,057 10,070.6 1.1         351.3
Hepatitis D 0 0 0 0 0 0 0 0 0 0 4 2 11 10.6 1.0 - 54 48.6 1.1 -
Gastrointestinal diseases
Botulism 0 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0.0 - 0 2.0 0.0 -
Campylobacteriosis 21 NN 14 333 162 29 21 152 732 1,000 1,008 2,980 6,867 5,083.4 1.4 - 24,176 18,181.0 1.3 -
Cryptosporidiosis 8 100 5 97 9 0 56 37 312 234 437 753 1,342 889.6 1.5 - 5,293 3,167.0 1.7 169.7
Haemolytic uraemic syndrome (HUS) 0 0 0 0 0 0 0 0 0 0 2 1 6 5.4 1.1 - 13 18.2 0.7 -
Hepatitis A 1 1 0 3 0 0 9 1 15 5 6 25 48 49.6 1.0 - 137 182.4 0.8 -
Hepatitis E 0 0 0 2 0 0 0 1 3 2 2 11 14 12.6 1.1 - 41 40.6 1.0 -
Listeriosis 2 1 0 2 0 0 1 0 6 1 2 10 24 23.0 1.0 - 86 78.2 1.1 -
Paratyhoid 0 1 0 0 0 0 2 0 3 6 7 9 21 24.2 0.9 - 70 72.4 1.0 -
STEC 0 0 0 1 10 0 1 3 15 18 6 66 142 39.0 3.6 83.8 372 129.2 2.9 175.2
Salmonellosis 54 236 23 300 87 11 177 163 1,051 978 1,300 2,875 5,211 4,214.4 1.2 - 18,161 14,010.4 1.3 -
Shigellosis 0 9 4 12 0 2 31 8 66 77 62 203 394 233.6 1.7 - 1,421 746.4 1.9 114.1
Typhoid Fever 0 4 0 0 1 0 4 1 10 7 6 20 37 35.8 1.0 - 107 127.2 0.8 -
Quarantinable diseases
Avian influenza in humans (AIH) 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Cholera 0 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0.0 - 1 3.6 0.3 -
Middle East respiratory syndrome coronavirus (MERS-CoV) 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Plague 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Rabies 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Severe Acute Respiratory Syndrome (SARS) 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Smallpox 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Viral haemorrhagic fever (NEC) 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Yellow fever 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.4 0.0 -
Sexually transmissible infections
Chlamydial infection 66 1,156 75 1,237 226 0 3 512 3,275 2,670 3,147 8,393 17,250 19,389.4 0.9 - 75,189 81,214.0 0.9 -
Donovanosis 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.4 0.0 -
Gonococcal infection 11 436 59 255 41 7 264 179 1,252 1,163 1,015 3,476 6,645 3,951.8 1.7 1,348.3 24,057 15,335.4 1.6 3,893.6
Syphilis < 2 yearsᵡ 3 13 12 31 0 0 24 10 93 100 134 313 711 483.0 1.5 - 3,128 1,901.8 1.6 23.2
Syphilis > 2 years or unspecified duration 0 5 1 12 0 0 58 7 83 101 76 253 483 373.8 1.3 - 1,920 1,654.4 1.2 -
Syphilis - congenital 0 0 0 0 0 0 0 0 0 0 0 0 0 0.8 0.0 - 2 4.2 0.5 -
Vaccine preventable diseases
Diphtheria 0 0 0 0 0 0 0 0 0 0 1 0 3 0.4 7.5 1.5 7 2.4 2.9 1.3
Haemophilus influenzae type b 0 0 0 0 0 0 0 0 0 0 0 1 5 3.0 1.7 - 19 17.2 1.1 -
Influenza (laboratory confirmed) 9 346 84 385 161 10 148 63 1,206 1,203 690 3,597 8,410 3,019.8 2.8 2,916.1 92,534 53,867.6 1.7 -
Measles 0 1 0 0 0 0 0 0 1 9 5 15 31 43.0 0.7 - 103 188.6 0.5 -
Mumps 0 4 3 7 3 0 3 4 24 18 52 66 111 97.8 1.1 - 743 298.0 2.5 -
Pertussis 16 268 8 49 77 1 87 59 565 635 1,061 1,828 4,796 6,040.0 0.8 - 18,810 21,575.4 0.9 -
Pneumococcal disease (invasive) 0 7 1 5 2 1 6 3 25 34 20 109 316 267.0 1.2 2.7 1,682 1,659.4 1.0 -
Poliovirus infection 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Rotavirus NN 21 2 59 11 0 NN 11 NN NN NN 338 775 N/A N/A - 2,646 N/A N/A -
Rubella 0 0 0 0 0 0 0 1 1 2 2 3 4 5.6 0.7 - 18 30.4 0.6 -
Rubella congenital 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.8 0.0 -
Tetanus 0 0 0 0 0 0 0 0 0 0 0 0 1 1.6 0.6 - 6 3.8 1.6 -
Varicella zoster (chickenpox) 1 NN 0 3 13 0 3 21 41 44 69 144 433 543.4 0.8 - 2,228 2,166.0 1.0 -
Varicella zoster (shingles) 6 NN 9 0 69 11 1 53 149 191 276 510 1,273 1,337.6 1.0 - 6,026 5,129.4 1.2 -
Varicella zoster (unspecified) 4 NN 0 323 55 16 0 86 484 372 619 1,253 2,543 2,869.2 0.9 - 13,037 11,009.6 1.2 -
Vectorborne diseases
Barmah Forest virus infection 0 2 4 15 0 0 0 0 21 13 26 42 85 343.4 0.2 - 312 1,781.8 0.2 -
Chikungunya virus infection 0 0 0 2 1 0 1 0 4 0 1 9 35 20.8 1.7 - 113 82.8 1.4 -
Dengue virus infection 1 17 2 22 1 0 0 14 57 65 100 173 328 424.6 0.8 - 2,089 1,537.8 1.4 -
Flavivirus unspecified (unspecified) 0 0 0 1 0 0 0 0 1 2 11 4 15 4.2 3.6 - 104 14.4 7.2 78.0
Japanese encephalitis virus infection 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0.0 - 0 1.8 0.0 -

Malaria

1 3 1 9 0 0 6 4 24 21 23 57 98 90.6 1.1 - 320 342.2 0.9 -
Murray Valley encephalitis virus infection 0 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0.0 - 0 3.8 0.0 -
Ross River virus infection 3 145 7 73 58 2 219 64 571 555 168 1,626 2,136 1,248.0 1.7 - 4,449 5,699.2 0.8 -
West Nile/Kunjin virus infection 0 0 0 0 0 0 0 0 0 0 0 0 0 0.4 0.0 - 0 1.2 0.0 -
Zoonoses
Anthrax 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Australian bat lyssavirus infection 0 0 0 0 0 0 0 0 0 0 0 0 0 0.2 0.0 - 0 0.2 0.0 -
Brucellosis 0 0 0 0 0 0 0 0 0 1 0 3 5 6.0 0.8 - 19 23.2 0.8 -
Leptospirosis 0 2 0 6 0 0 0 0 8 9 4 20 35 16.6 2.1 6.0 143 108.4 1.3 -
Lyssavirus infecton (NEC) 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.0 0.0 -
Ornithosis 0 0 0 0 0 0 0 1 1 1 2 3 7 15.8 0.4 - 18 53.8 0.3 -
Q fever 0 6 0 8 0 0 0 0 14 18 25 54 137 115.6 1.2 - 543 461.6 1.2 -
Tularaemia 0 0 0 0 0 0 0 0 0 0 0 0 0 0.0 0.0 - 0 0.4 0.0 -
Other bacterial infections
Legionellosis 0 5 0 0 1 1 2 0 9 19 10 46 97 95.2 1.0 - 384 406.8 0.9 -
Leprosy 0 0 0 0 0 0 0 0 0 0 1 1 4 2.6 1.5 - 20 11.2 1.8 -
Meningococcal disease (invasive) 0 2 0 6 0 0 0 3 11 6 5 36 70 35.8 2.0 17.3 262 191.0 1.4 4.0
Tuberculosis 2 7 0 15 0 0 7 3 34 34 64 120 332 323.2 1.0 - 1,352 1,313.2 1.0 -
Totals 214 3,052 318 3,423 991 97 1,244 1,534 10,769 10,247 11,197 31,189 65,304        320,464       
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