San Diego County has detected local transformation of dengue fever for the first time.
An adult female, Aedes aegypti mosquito seen ready to bite a human. These mosquitoes bite during the day and the nighttime. The county health department is investigating what public health officials suspect is the first ever locally transmitted case of dengue, the tropical disease that has recently seen an uptick in transmission nationwide.
Such a chain of transmission usually fizzles out on its own, but it can continue indefinitely if additional mosquitoes feed on an infected person before their infection is detected. Public health departments often do what they can to interrupt any possible chain of transmission out of an abundance of caution.
Spraying is expected to continue through Thursday. Similar efforts have recently occurred in Oceanside and the Mount Hope neighborhood in San Diego after travel-associated dengue cases popped up.Dr. Ankita Kadakia, the county’s interim public health officer, said Sunday that she believes the overall risk of additional transmission is low.
Local transmission is not unique to San Diego County. Los Angeles County has reported five locally contracted dengue cases so far this year with Long Beach and Pasadena reporting their first cases in 2023.
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