From the Sacramento Bee
July 11, 2019
The Sacramento-Yolo Mosquito and Vector Control District reported Wednesday that, for the first time this year, a mosquito sample collected within the two-county district has tested positive for West Nile virus.
This particular sample was collected near the Florin area of south Sacramento County, officials said, and the news did not come as a surprise to them because a dead bird tested positive for the disease last week near Elverta in north Sacramento County.
“As we expected, after finding the first positive bird … we are finding virus in the mosquito populations, “ said Gary Goodman, the district manager. “With the very warm weather expected over the next few days, we expect (West Nile virus) activity to quickly ramp up.”
Luz Robles, the district’s public information officer, said cool weather this year likely has helped to keep mosquito activity low. By this time in 2018, there was more activity because temperatures were high.