From the Los Angeles Times
October 15, 2019
Mosquitoes collected in Anaheim and Westminster have tested positive for St. Louis encephalitis — the first occurrence in those cities in three decades, Orange County officials announced Tuesday.
The mosquitoes were collected late last week along Old Bolsa Chica Road in Westminster and near Dale and Orange avenues in Anaheim, according to Heather Hyland of the Orange County Mosquito and Vector Control District.
The last time any St. Louis encephalitis-positive mosquitoes were found in those areas was 1987, according to the district. Mosquitoes testing positive for the virus
were found in 2017 near the vector control offices in Garden Grove, the agency said.