2026 Weekly Updates

Dead birds can be reported online at Report a Dead Bird all year or directly to the District at 559-732-8606. For information about WNV in the entire state of California or all of Tulare County, please visit westnile.ca.gov.

Mosquito Samples

West Nile Virus: 0*    St. Louis Encephalitis Virus: 0*    Western Equine Encephalitis Virus: 0

There are 0 West Nile virus positive mosquito samples in so far 2026. There have been a total of 0 West Nile virus positives*, 0 St. Louis encephalitis virus positives*, and 0 West Nile virus and St. Louis encephalitis virus positive mosquito samples out of 1,250 samples tested so far in 2026. Cities with positive mosquito samples this year include: none.

*Includes 0 mosquito samples with WNV/SLEV co-infection.

A sample may contain up to 50 individual mosquitoes.

Dead Birds

West Nile Virus: 0         St. Louis Encephalitis Virus: 0         Western Equine Encephalitis Virus: 0

There are 0 WNV positive dead birds from Visalia. A total of 0 dead birds have been tested so far in 2026.

Report dead birds to the WNV call center at 1-877-968-2473, online at westnile.ca.gov, or directly to the District at 559-732-8606. Dead birds may be testable for WNV, SLEV, and WEEV. 

Human Cases

West Nile Virus: 0        St. Louis Encephalitis Virus: 0         Western Equine Encephalitis Virus: 0

There are 0 human WNV cases and 0 asymptomatic WNV cases reported in the District so far in 2026.

The Tulare County Public Health Department reports human cases to the District.