Reported giardiasis surveillance for United States (USA) — ≈ Stable · 2025 — latest record 2026-10-25
As of 25 October 2026, the United States has reported 11,762 giardiasis cases in 2026, as published by CDC NNDSS Weekly Notifiable Diseases (State-Level). The full year 2025 closed at 7,040 cases. The three-year baseline for United States is 6,730 cases a year. 2025 closed 5% above 3yr avg (WHO historical series), which is why the trend reads “≈ Stable”.
Of the 16 countries reporting giardiasis to ENCLAI in 2026, United States accounts for 59.1% of reported cases and ranks 1 by case count.
ENCLAI has logged 1,688 surveillance records for giardiasis in United States in 2026, with the most detailed reporting in Aug 2026 (200 records). 120 of those arrived in the last 30 days; the case counts run to 2026-10-25. 1 distinct surveillance sources reported this pair in 2026.
Reporting authorities for these counts: CDC NNDSS Weekly Notifiable Diseases (State-Level)
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| Year | Reported cases | Share of worldwide reports |
|---|---|---|
| 2023 | not reported | — |
| 2024 | incomplete year | — |
| 2025 | 7,040 | 28.6% |
| 2026 (year to date) | 11,762 | 59.1% |
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 giardiasis 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 | 160 | 1 |
| Feb 2026 | 143 | 1 |
| Mar 2026 | 191 | 1 |
| Apr 2026 | 156 | 1 |
| May 2026 | 198 | 1 |
| Jun 2026 | 160 | 1 |
| Jul 2026 | 160 | 1 |
| Aug 2026 | 200 | 1 |
| Sep 2026 | 160 | 1 |
| Oct 2026 | 160 | 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. 120 records were logged in the last 30 days.
Areas within United States with the most giardiasis records this year:
| Area | Records |
|---|---|
| Arizona | 44 |
| Arkansas | 44 |
| California | 44 |
| Colorado | 44 |
| Florida | 44 |
| Country | 2026 cases | Trend |
|---|---|---|
| Ukraine | 2,534 | ≈ Stable · 2025 |
| Poland | 2,406 | ▲ Rising · 2025 |
| Spain | 1,782 | ≈ Stable · 2025 |
| New Zealand | 397 | ≈ Stable · 2025 |
| Germany | 392 |
| Disease | 2026 cases | Trend |
|---|---|---|
| Chlamydia infection | 905,268 | |
| Gonococcal infection | 302,104 | |
| Hepatitis C | 62,543 | ▲ Rising · 2025 |
| Coccidioidomycosis | 47,150 | |
| Campylobacteriosis | 46,302 | ▲ Rising · 2025 |
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