Influenza Activity Surveillance 2018
This report provides a summary of surveillance data collected from around Australia and New Zealand. Regional reporting in some areas ceases when flu activity is low (out of season). Please note that many people do not get tested for influenza and that there may also be some delays in reporting confirmed influenza cases.
Therefore data presented here may be underestimating influenza activity.
Click above for an up to date PDF of Australian Influenza Statistics.
Commonwealth Department of Health & Ageing
There have been a total of 8,602 laboratory confirmed notifications of Influenza in Australia for 2018, at the start of 19 March.
- ACT: 100
- NSW: 2,812
- NT: 71
- QLD: 2,686
- SA: 853
- TAS: 52
- VIC: 1,338
- WA: 690
For more national data:
February 2018 Report
Influenza A and B strains are circulating at higher levels than is usual for this time of year but appear to be declining. Both strains are circulating at similar levels.
The rate of influenza like illness (ILI) presentations to selected emergency departments was low and consistent with inter-seasonal activity.
Laboratory testing summary for influenza:
Sentinel laboratory surveillance for influenza and other respiratory viruses is conducted throughout the year. In February 2018 :
A total of 14,540 tests for respiratory viruses were performed at sentinel NSW laboratories and 1,034 ( 7. 1 %) were positive for influenza, slightly lower than the previous month (7.8%).
531 specimens tested positive for influenza A – 32 of these tested positive for A(H3N2), 35 tested positive for influenza A (H1N1) and 462 were not typed further.
503 cases of influenza B were reported.
The influenza test positive rate remains higher than usual for this time of year but is declining. The high inter-seasonal activity most likely reflects the high seasonal activity in the Northern Hemisphere.
Influenza notifications by Local Health District (LHD)
During February there were 1,144 notifications of influenza confirmed by polymerase chain reaction (PCR) testing , notably higher than the 589 influenza notifications reported for February 2017 and higher than the notifications reported for January 2018 (1,023).
Rates were low and similar across all LHDs with the exception of Northern Sydney which reported the highest notification rate well above other LHDs.
For more information: NSW Health – Infectious Diseases Alert
25 February – 3 March 2018
Eighty-four cases of influenza were reported this week with 39 cases being characterised as influenza A and 45 as influenza B. Cases comprised of 48 males and 36 females, with a median age of 43 years. There have been 722 cases of influenza notified year-to-date, compared with 679 cases reported for the same period last year.
For more information: Communicable Diseases Control Branch
Week ending 11 March 2018
INFLUENZA AND INFLUENZA-LIKE ILLNESSES (ILI)
Influenza activity is currently at inter-seasonal levels and has declined in recent weeks.
ILI presentations at sentinel GPs and EDs are fluctuating at low levels.
Influenza notifications and PathWest laboratory detections and percent positivity have decreased over the past fortnight, following higher than expected inter-seasonal activity earlier this year.
For more information: WA Virus WAtch
ASPREN is a national syndromic surveillance program co-ordinated by the Discipline of General Practice at the University of Adelaide and The Royal Australian College of General Practitioners. One of the conditions under surveillance is influenza like illness (ILI). General practitioners participating in the ASPREN program contribute data on the proportion of consultations which are ILI related.
29 January – 11 February 2018
Influenza-like-illness levels are decreasing.
3 cases of influenza have been detected this reporting period: 2 x Influenza A and 1 x Influenza B.
15% Influenza positivity during the reporting period.
13 cases of Influenza have been detected this year: 10 x Influenza A and 3 x Influenza B.
Reports were received from 263 reporters from 8 states and territories during the reporting period. During weeks 5 and 6 reporters saw a total of 42,232 patients.
Nationally, ILI notifications slightly decreased over the period with 50 notifications being reported in weeks 5 — 6. ILI rates reported in this period remained steady at 1 case per 1000 consultations (weighted) in weeks 5 and 6. This was slightly lower than seen in the previous fortnight where rates were 1 and 3 cases per 1000 consultations. For the same reporting period in 2017, ILI rates were the same at 1 case per 1000 consultations for weeks 5 and 6.
(Baseline ILL < 4 in 1000 consultations, Normal 4< ILL rate <24).
For more information: ASPREN
FluTracking is a pilot online health surveillance system which aims to detect epidemics of influenza. It is a joint initiative of The University of Newcastle, Hunter New England Area Health Service (NSW Health) and Hunter Medical Research Institute. Participation is voluntary and involves the completion of a weekly online survey during the influenza season. Data are collected on basic demographics, symptoms of ILI and absenteeism.
FLU TRACKING FOR 2018 HAS NOT YET COMMENCED
For more information, or to enrol: Flu Tracking
During February, influenza activity was low among consultation-seeking patients nationwide. Influenza activity was also low among those hospitalised ICU patients in Auckland and Counties Manukau District Health Boards.
ILI surveillance: One patient with influenza-like illness consulted sentinel general practices in 20 DHBs. The monthly ILI incidence was 0.2 per 100 000 patient population.
ICU surveillance: Since the 1 January 2018, there were 17 cases admitted to ICU.
For more information: NZ Flu Surveillance
Page published: 5 March 2018
Last updated: 19 March 2018