# Giardia duodenalis outbreak — Washington, 1991-07
> **Water** · Confirmed · 4 ill / 0 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-fa822da3e005
- **Date:** 1991-07
- **State:** Washington
- **Primary mode:** Water
- **Etiology:** Giardia duodenalis
- **Etiology status:** Confirmed
- **Setting:** Camp/cabin
## Impact
- **Illnesses:** 4
- **Hospitalizations:** 0
- **Deaths:** 0
## Water exposure

- **Exposure:** Recreational water -- untreated
- **Water type:** Lake/Reservoir

## Source
- [NORS Dashboard](https://wwwn.cdc.gov/norsdashboard/)
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