Reported legionellosis surveillance for Australia (AUS) — — latest record 2026-11-06
As of 31 October 2026, Australia has reported 646 legionellosis cases in 2026, compiled from figures published by Australia NNDSS Fortnightly Report and 2 other reporting authorities. The full year 2025 closed at 749 cases.
Of the 7 countries reporting legionellosis to ENCLAI in 2026, Australia accounts for 10.0% of reported cases and ranks 3 by case count.
ENCLAI has logged 181 surveillance records for legionellosis in Australia in 2026, with the most detailed reporting in Sep 2026 (42 records). 14 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
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.
| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | not reported | — |
| 2024 | not reported | — |
| 2025 | 749 | 7.9% |
| 2026 (year to date) | 646 | 10.0% |
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 legionellosis 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.
| Month | Records | Reporting sources |
|---|---|---|
| Jan 2026 | 16 | 1 |
| Feb 2026 | 13 | 1 |
| Mar 2026 | 15 | 1 |
| Apr 2026 | 9 | 2 |
| May 2026 | 14 | 2 |
| Jun 2026 | 21 | 1 |
| Jul 2026 | 15 | 2 |
| Aug 2026 | 22 | 2 |
| Sep 2026 | 42 | 2 |
| Nov 2026 | 14 | 1 |
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. 14 records were logged in the last 30 days.
Areas within Australia with the most legionellosis records this year:
| Area | Records |
|---|---|
| Queensland | 20 |
| South Australia | 20 |
| Victoria | 20 |
| Western Australia | 20 |
| New South Wales | 19 |
| Country | 2026 cases | Trend |
|---|---|---|
| United States | 4,988 | ▲ Rising · 2025 |
| South Korea | 723 | ▲ Rising · 2025 |
| New Zealand | 64 | ≈ Stable · 2025 |
| Lithuania | 42 | ▲ Rising · 2025 |
| Singapore | 19 |
| Disease | 2026 cases | Trend |
|---|---|---|
| Seasonal influenza | 269,750 | |
| Respiratory syncytial virus infection | 138,359 | |
| COVID-19 | 86,718 | |
| Chlamydia infection | 81,179 | |
| Gonococcal infection | 38,898 |
Track legionellosis in Australia live — alerts, exports and sub-national drill-down: start a 7-day free trial or request a demo.
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.
