Activity continues throughout Sacramento County

Elk Grove, Ca— The Sacramento-Yolo Mosquito &Vector Control District announced today that the first signs of West Nile virus activity have been detected in Yolo County as 2 mosquito samples, one from Winters and the other from Zamora both tested positive for the disease. At the same time, West Nile virus activity continues to gradually spread throughout Sacramento County as 5 new dead birds and 7 more mosquito samples tested positive this week. “With the warmer temperatures we’ve seen recently West Nile virus activity continues to increase,” said Gary Goodman District Manager. “While we have seen a significant decrease in WNV activity this season as compared to previous years, it’s extremely important that residents take proper precautions to protect themselves from mosquito bites especially as they enjoy outdoor evening activities when mosquitoes are most active” added Goodman.

Throughout the region West Nile virus activity remains constant and neighboring Placer and San Joaquin counties have also registered evidence of the virus. Recently, the first death related to WNV was confirmed in Imperial County. To date, 4 human cases have been confirmed throughout the state.  Last year in California, there were 217 confirmed human cases including 11 fatalities.

In response to the recent findings, the District will continue to monitor all West Nile virus activity through widespread mosquito trapping and testing as well as ground treatments in areas where positive mosquitoes have been found to quickly decrease populations and protect public health.

To see a complete map of the WNV findings and for current information about District activities, please visit Residents may also subscribe to mailing lists to receive email notifications for upcoming mosquito treatments by zip code. To sign up, go to Spray Notifications on the website at

2019 West Nile virus activity update:

Sacramento County:   16 mosquito samples and 12 dead birds have tested positive for West Nile virus to date.

Yolo County:  2 mosquito samples have tested positive for West Nile virus to date

Practice the District D’s of Mosquito Prevention:
DRAIN standing water that may produce mosquitoes.
DAWN and DUSK are times to avoid being outdoors.
DRESS appropriately be wearing long sleeves and pants when outside.
DEFEND yourself by using an effective insect repellent.  Make sure to follow label directions!
DOOR and window screens should be in good working condition.
DISTRICT personnel are also available to address any mosquito problems. Call them at 1-800-429-1022 or visit

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