West Nile Virus: 2017 Data

West Nile virus home

Historical surveillance data collected for 2017 West Nile virus in Wisconsin. The information includes positive cases among birds, horses and within tested mosquito pools. Indicated human cases are both confirmed and probable. Tables show cases reported by age and month of illness onset.

2017 Annual Wisconsin West Nile Virus Summary Data

2017 Annual Wisconsin Summary Data
Positive WNV Cases - Updated December 20, 2017

Avian (bird) 87
Equine (horse) 24
Mosquito pools 37
Human confirmed 39
Human probable* 12
Deaths** 4
Hospitalizations 41
Counties reporting WNV activity 66

*Probable cases have presumptive positive laboratory results without confirmatory testing at CDC.
**The deaths are included among the confirmed and probable cases.

2017 Wisconsin Confirmed and Probable West Nile Virus Cases Reported by Age

Graph of confirmed and probably West Nile Virus cases by age 2017

2017 Wisconsin Confirmed and Probable West Nile Virus Cases Reported by Month of Illness Onset

Graph of Confirmed and Probably West Nile Virus Cases by Month 2017

2017 West Nile Virus Activity in Wisconsin Counties

Last Revised: August 17, 2018