Compiled by the ENCLAI research team following a documented methodology · Editorial oversight: Dr Natalya Mathur, Founder · Data last updated: (UTC)

Barmah Forest virus disease in Australia: 2026 cases and outbreak reports

Reported barmah forest virus disease surveillance for Australia (AUS) — — latest record 2026-11-06

What the 2026 data shows

As of 31 October 2026, Australia has reported 179 Barmah Forest virus disease cases in 2026, compiled from figures published by Australia NNDSS Fortnightly Report and 2 other reporting authorities. The full year 2025 closed at 265 cases.

Of the 1 countries reporting barmah forest virus disease to ENCLAI in 2026, Australia accounts for 100.0% of reported cases and ranks 1 by case count.

ENCLAI has logged 102 surveillance records for barmah forest virus disease in Australia in 2026, with the most detailed reporting in Sep 2026 (24 records). 9 of those arrived in the last 30 days; the case counts run to 2026-10-31. 3 distinct surveillance sources reported this pair in 2026.

Reporting authorities for these counts: Australia NNDSS Fortnightly Report — State/Territory Level · Australia NNDSS Fortnightly Report (Australian CDC) · Australia NNDSS data visualisation tool — monthly notifications, national and state

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Surveillance summary

2026 cases (YTD)
179
2025 cases (full year)
265
Baseline avg (3yr)
N/A
Trend (2025)
—
No comparable earlier years

Reported cases by year, Australia

YearReported casesShare of worldwide reports
2023 not reported —
2024 not reported —
2025 265 100.0%
2026 (year to date) 179 100.0%

Reporting bounds and case definitions vary; historical baselines are a separate comparison measure. Worldwide share compares this country's reported figure with the sum of all countries reporting barmah forest virus disease to ENCLAI for that year. "Incomplete year" means our sources cover less than ten months of that year, so no full-year figure is shown; "outbreak total to date" is a running total since an outbreak began, not a count for one year.

Surveillance records logged in 2026

MonthRecordsReporting sources
Jan 202691
Feb 202681
Mar 2026111
Apr 202642
May 202681
Jun 2026111
Jul 202671
Aug 2026111
Sep 2026242
Nov 202691

A record is one dated surveillance publication or one row of an official table; a month with many records is a month with detailed reporting, not necessarily more cases. 9 records were logged in the last 30 days.

Sub-national reporting, 2026

Areas within Australia with the most barmah forest virus disease records this year:

AreaRecords
Queensland20
New South Wales19
Western Australia13
Northern Territory3
South Australia3

Other diseases reported in Australia, 2026

Disease2026 casesTrend
Seasonal influenza 269,750
Respiratory syncytial virus infection 138,359
COVID-19 86,718
Chlamydia infection 81,179
Gonococcal infection 38,898

Questions about this page

How many Barmah Forest virus disease cases has Australia reported in 2026?
As of 31 October 2026, Australia has reported 179 Barmah Forest virus disease cases in 2026, compiled from figures published by Australia NNDSS Fortnightly Report and 2 other reporting authorities. The full year 2025 closed at 265 cases.
Where does Australia publish Barmah Forest virus disease surveillance data?
The counts on this page were published by Australia NNDSS Fortnightly Report — State/Territory Level, Australia NNDSS Fortnightly Report (Australian CDC) and Australia NNDSS data visualisation tool — monthly notifications, national and state. ENCLAI compiles and normalises them and is not affiliated with these authorities.

About this data

Figures are reported case counts as published by the originating health authorities, compiled by ENCLAI from 444 verified surveillance sources. Australia figures reflect the reporting available to ENCLAI; reporting periods and case definitions differ between sources, and a missing report does not establish zero cases. ENCLAI holds barmah forest virus disease records for Australia dated from 2025. How we verify and update data: methodology & Trust Center · understanding case counts.

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The daily disease brief

One email a day: what changed in official disease reporting worldwide, with the source named for every number. Reported facts only — no forecasts and no interpretation.

Double opt-in — we send a confirmation link and nothing else until you click it. One-click unsubscribe on every email. See our privacy notice.