Franklin County Public Health will spray for mosquitoes across all Upper Arlington neighborhoods south of McCoy Road on Monday, Sept. 21, after local traps tested positive for West Nile virus.

Spraying begins at 8:30 p.m., weather permitting, according to a city of Upper Arlington alert published Sept. 17. The operation will continue overnight.

The spray targets the city's central and southern neighborhoods. Mosquitoes collected in gravid traps in the area tested positive for the virus, prompting the decision, the city said. Upper Arlington contracts with Franklin County Public Health (FCPH) for its mosquito management program.

FCPH has used an insecticide called Permanone 30-30, a low-odor spray targeting adult mosquitoes, for its operations this year, the Columbus Dispatch reported. The health department posts spray zones on an interactive map at mosquito.myfcph.org/spray-schedule-maps/.

Most people exposed to West Nile virus do not develop symptoms. About one in five infected people experience fever, headache and body aches. Serious complications can occur in roughly one in 150 cases, according to the CDC, with people older than 60 and those with conditions such as cancer or diabetes facing greater risk.

Residents can contact FCPH at (614) 525-3719 or visit myfcph.org.