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dengue fever

Kerry Klein / Valley Public Radio

Summer is approaching in the San Joaquin Valley, and that means it’s not only the season for sunscreen and paletas, but also mosquitoes—something local authorities are working on. For the last two years, the Fresno area has been the site of an experimental mosquito control program. And it’s back again. Here we examine the project’s latest, scaled-up season, and why it appears to be working.

Last week it made national headlines: a company with ties to Google is releasing 20 million mosquitoes in Fresno. It might sound like a bad idea, but it's actually part of an innovative plan called "Debug Fresno" that aims to stop the local spread of the Aedes aegypti mosquito, which can spread dengue fever and the zika virus.

Fresno County Department of Public Health

Zika has finally appeared in Fresno County. An adult woman tested positive for the virus after traveling internationally and developing flu-like symptoms. Health officials won’t reveal where she traveled.

Fifty-five cases of Zika have been reported in California since January of last year, out of almost a thousand nationally. None are believed to have been transmitted locally, though some were spread through sexual contact.

Fresno County Department of Public Health

Two different types of mosquitoes – one that carries West Nile Virus and another that can spread dengue and yellow fever have Fresno County health officials on high alert.

The county says a crow reported earlier this month tested positive for West Nile Virus. Officials have also detected the presence of another invasive mosquito species that can spread potentially serious tropical diseases. In severe cases, the more serious symptoms stemming from these diseases can lead to death.

David Luchini is the assistant director for the county’s Department of Public Health.