The county has deployed its Vector Control team to prevent the virus from spreading. "This mosquito is unique in some ways. One thing is that it doesn't fly very far," said Dr. Mark Beatty, assistant medical director with the county's Public Health Department. Beatty urged residents to start with their own yards, where mosquitoes nest and lay eggs. "They love humans," Beatty said. "If people have things holding water in their yards, like flower pots or pet bowls, they should dump them out." He also noted that these mosquitoes are known as ankle biters. "Using permethrin-based repellents on clothing and wearing long sleeves can help prevent bites," he said. The dengue virus was detected in a person living near Bear Valley Parkway and Glenridge Road in Escondido, where the county has focused its mosquito control efforts.