Mosquitoes collected from south San Jose have tested positive for West Nile virus, according to the Santa Clara County Vector Control District.

The positive detection has prompted the vector control district to plan a mosquito fogging treatment in the south San Jose area on Wednesday night at 11 p.m. The fogging is scheduled to last for several hours.

“West Nile virus continues to be active in mosquitoes in the southwest San Jose area, so it is important to keep the numbers of mosquitoes as low as possible,” district manager Russ Parman said in a statement.

“Estimates are that from one to three percent of the mosquitoes in this area are carrying the virus,” Parman said.

The general area of the fogging is bordered by Hillsdale Avenue on the north, Kenton Lane and Glenmont Drive on the west, Monterey and Dunn avenues on the east, and Foothill Drive on the south.

A map of the planned fogging area can be viewed at

Information regarding the fogging will be distributed to area residents this week, according to the district.