Reported legionellosis surveillance for New Zealand (NZL) — ≈ Stable · 2025 — latest record 2026-10-13
As of 31 July 2026, New Zealand has reported 64 legionellosis cases in 2026, compiled from figures published by PHF Science / ESR. The full year 2025 closed at 168 cases. 2025 closed 20% below the 2023–2024 average, which is why the trend reads “≈ Stable”.
Of the 7 countries reporting legionellosis to ENCLAI in 2026, New Zealand accounts for 1.0% of reported cases and ranks 4 by case count.
ENCLAI has logged 153 surveillance records for legionellosis in New Zealand in 2026, with the most detailed reporting in May 2026 (108 records). 16 of those arrived in the last 30 days; the case counts run to 2026-07-31. 2 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: PHF Science / ESR — NZ Monthly Notifiable Disease Surveillance (by district)
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| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | 238 | 37.5% |
| 2024 | 181 | 15.9% |
| 2025 | 168 | 1.8% |
| 2026 (year to date) | 64 | 1.0% |
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 |
|---|---|---|
| May 2026 | 108 | 1 |
| Jun 2026 | 16 | 1 |
| Jul 2026 | 8 | 1 |
| Aug 2026 | 5 | 1 |
| Oct 2026 | 16 | 2 |
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. 16 records were logged in the last 30 days.
Areas within New Zealand with the most legionellosis records this year:
| Area | Records |
|---|---|
| Auckland | 16 |
| Waikato Region | 15 |
| Canterbury | 14 |
| Bay of Plenty | 12 |
| Nelson Region | 12 |
| Country | 2026 cases | Trend |
|---|---|---|
| United States | 4,988 | ▲ Rising · 2025 |
| South Korea | 723 | ▲ Rising · 2025 |
| Australia | 646 | |
| Lithuania | 42 | ▲ Rising · 2025 |
| Singapore | 19 |
| Disease | 2026 cases | Trend |
|---|---|---|
| COVID-19 | 6,909 | ▼ Declining · 2025 |
| Campylobacteriosis | 2,271 | ≈ Stable · 2025 |
| Whooping cough (pertussis) | 909 | ▲ Rising · 2025 |
| Non-typhoidal salmonellosis | 493 | ▲ Rising · 2025 |
| Enterohaemorrhagic E. coli (EHEC) infection | 469 | ≈ Stable · 2025 |
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