San Diego County health authorities reported the first locally acquired case of dengue, contracted by a resident of Escondido. The affected individual had not traveled to an area where the virus is common, according to officials. So far, no additional local cases have been identified, although there have been at least 49 travel-related cases reported this year.

"While the risk of widespread dengue transmission remains low in San Diego County, County Public Health and Vector Control are working closely to prevent the spread of the disease," stated Dr. Ankita Kadakia, the county's interim public health officer. To prevent the spread, the County Vector Control began mosquito spraying at about 170 homes in Escondido, with treatments continuing until October 10. Similar actions were taken in Oceanside in September and in the Mount Hope area in July.

Dengue is a tropical viral disease that is uncommon in the United States. It is transmitted when an infected mosquito bites one person and then another. Symptoms, including fever, chills, aches, nausea, vomiting, and rashes, usually appear four to seven days after the bite. While most people recover within a week, severe cases can be fatal.

To prevent mosquito proliferation, authorities recommend eliminating containers with standing water, using insect repellent, and ensuring that window and door screens are in good condition. Spraying is being done with AquaDuet, an EPA-approved pesticide that poses low risk to people and pets. Residents are advised to stay indoors and take minimal precautions during treatments. Based on information from NBC San Diego.