# Unknown;Leptospira interrogans;Leptospira unknown outbreak — Illinois, 1998-06
> **Water** · Suspected;Suspected;Confirmed · 375 ill / 28 hosp / 0 deaths
## Outbreak
- **NORS ID:** NORS-1ea97c502d78
- **Date:** 1998-06
- **State:** Illinois
- **Primary mode:** Water
- **Etiology:** Unknown;Leptospira interrogans;Leptospira unknown
- **Etiology status:** Suspected;Suspected;Confirmed
- **Setting:** Park - Other/Unspecified
## Impact
- **Illnesses:** 375
- **Hospitalizations:** 28
- **Deaths:** 0
## Water exposure

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

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