Los Angeles County health officials are investigating the first locally acquired case of dengue fever for the 2025 mosquito season, reported in a San Gabriel Valley resident.

The individual, who had not traveled to areas where dengue is common, developed symptoms in late September and is recovering, health officials said in a news release.

Officials said the overall risk of dengue transmission in the county remains low.

The department is working with the San Gabriel Valley Mosquito and Vector Control District to conduct enhanced mosquito surveillance, reduce mosquito populations and inform residents.

“In response to emerging disease risk, the district rapidly launched enhanced mosquito control operations across the community,” District Manager Jason Farned said in a statement. “Teams a

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