West Nile Virus Found in San Jose: First Human Case Reported

The first human case of West Nile virus this season has been identified in a Santa Clara County resident. Although the individual contracted the illness elsewhere in California, their diagnosis was reported in Santa Clara County due to their residence.

Public health officials have remained tight-lipped about further details of the case, as the adult patient, who has been hospitalized but is now recovering at home, is protected by medical privacy laws according to The Mercury News. In response to the situation, the Santa Clara County Vector Control District recently disclosed findings of West Nile Virus-positive mosquitos in San Jose, Milpitas, Sunnyvale, and Santa Clara, and subsequently announced plans to spray affected areas with Zenivex, a mosquito-targeting insecticide.

Residents do not need to evacuate during the spraying operations, and the treatments are considered to pose minimal risk when applied by a licensed professional. However, as an added precaution, people can choose to stay indoors with windows and doors closed during the approximately four-hour treatment period.

West Nile virus, described by the Santa Clara Public Health Department as a mosquito-borne disease causing mild to severe flu-like symptoms, poses a low risk for serious illness among most people who contract it. Nevertheless, there are some populations—such as those over 60 years old or individuals with specific medical conditions—who may be at greater risk for severe health complications.

Although the risk remains low for the majority of people, earlier this year, a Santa Clara County resident died from the virus. The individual had contracted the disease in Contra Costa County.

With the season for peak transmission running from summer through early fall, the Vector Control District advises residents to be vigilant against the disease by draining standing water that could serve as breeding grounds for mosquitos.