SAN DIEGO—San Diego County health officials are investigating the first case of locally acquired dengue virus Monday from an Escondido resident who became sick with the mosquito-related disease.
The county resident who contracted the disease did not travel to an area where the virus was common. No additional locally acquired cases have been identified, although there have been at least 49 reported cases of travel- related dengue in the county this year, according to officials.
To prevent the disease from spreading, County Vector Control began spraying this weekend for mosquitoes at about 170 homes in Escondido, with treatments that began on Oct. 4 and will continue until Oct. 10, officials said in a statement from the county….