2022 Weekly Updates

Arbovirus testing has started for the season. Dead birds can be reported to 1-877-968-2473 or directly to the District at 559-732-8606. Activity within the District is updated weekly. For information about WNV in the entire state of California, please visit westnile.ca.gov.

Mosquito Samples

West Nile Virus: 978*      St. Louis Encephalitis Virus: 8*      Western Equine Encephalitis Virus: 0

There were 3 new WNV positive mosquito samples. So far this year, West Nile virus has been detected in mosquito samples from the following cities and regions: (7) Calgro, (2) Cutler, (14) Delft Colony, (83) Dinuba, (11) Exeter, (3) Farmersville, (3) Goshen, (8) Ivanhoe, (6) north Kings River, (4) Orosi, (51) Peral, (7) Rural, (49) Sequoia Fields, (1) Seville, (3) south Kings River, and (725) Visalia.  Additionally, SLEV was detected in the following cities and regions: (8*) Visalia.

In 2022, a total of 4,671 mosquito samples have been tested so far with 975 samples positive for WNV, 5 samples positive for SLEV, and 3 samples co-infected with WNV and SLEV.

*3 samples tested positive for both WNV and SLEV.

A sample may contain up to 50 individual mosquitoes.

Dead Birds

West Nile Virus: 2         St. Louis Encephalitis Virus: 0         Western Equine Encephalitis Virus: 0

There were no new WNV positive dead bird from Visalia this week. Eight dead birds have been tested in 2022.

Report dead birds to the WNV call center at 1-877-968-2473. Dead birds may be testable for WNV, SLEV, and WEEV. 

Human Cases

West Nile Virus: 3         St. Louis Encephalitis Virus: 0         Western Equine Encephalitis Virus: 0

Three (3) probable human cases of WNV have been reported to Delta MVCD in 2022.

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