SAN JOSE — A portion of San Jose and Santa Clara will be fogged Thursday night after adult mosquitoes tested positive for West Nile virus, the Santa Clara County Vector Control District announced.

The fogging is scheduled to start at 11 p.m. Thursday and end around 2 a.m. Friday, weather permitting, according to the district.

The area that will be treated is bordered by Homestead Road to the north; The Alameda and Naglee Avenue to the east; South Street to the south and Saratoga Avenue and Los Padres Boulevard to the west. A detailed map of the treatment area is available at http://arcg.is/1JqkbyT. Door hangers were scheduled to be placed at homes in the affected area on Tuesday and Wednesday. Notifications will also be sent out for residents signed up with Nextdoor.

During the treatment, residents are asked to close their windows and stay inside, district officials said.

Those with questions about the fogging can call staff members from the district from 8 a.m. to 4 p.m. on Thursday and Friday at 800-314-2427. Questions can also be sent to vectorinfo@sccgov.org.

Contact Katie Nelson at 408-920-5006 and follow her at Twitter.com/katienelson210.