Los Angeles County health officials have confirmed the first human cases of West Nile virus this year, marking a seasonal reminder of the risks posed by mosquito-borne diseases across Southern California.
Four Residents Hospitalized With West Nile Virus
According to public health officials, four residents were hospitalized with West Nile virus infections between late July and August.
The patients lived in:
- Central Los Angeles
- Antelope Valley
- San Fernando Valley
The cases highlight how widespread the virus-carrying mosquito species has become throughout the county.
Health Officials Warn of Increased Mosquito Activity in Hot Weather
Los Angeles County’s Health Officer emphasized that the first confirmed cases of the year are a critical reminder for the public to take steps to prevent mosquito bites and limit mosquito breeding around homes.
Mosquitos reproduce more rapidly in warm temperatures, increasing the risk of infection during late summer and early fall.
How West Nile Virus Spreads and Common Symptoms
West Nile virus is transmitted to humans through the bite of an infected mosquito.
Typical symptoms include:
- Fever
- Headache
- Nausea
- Body aches
- Mild rash
While many people experience no symptoms or only mild illness, the virus can become severe.
Serious complications may include:
- Paralysis
- Encephalitis
- Meningitis
- In rare cases, death
Older adults—especially those over 50—and individuals with chronic health conditions face a higher risk of developing severe disease.
Mosquito Species That Carry West Nile Virus Found Throughout LA County
Although not every mosquito carries the virus, the primary species responsible for spreading West Nile virus is found countywide.
This makes prevention measures essential for residents in all neighborhoods, from coastal areas to the inland valleys.
How Residents Can Reduce Their Risk of West Nile Virus
Health authorities urge the public to take simple but effective steps to reduce mosquito exposure:
Recommended Prevention Measures
- Use EPA-approved insect repellents
- Eliminate standing water in containers, buckets, plant pots, and yards
- Install or repair window and door screens
- Wear long sleeves and long pants during peak mosquito hours (dawn and dusk)
These actions help reduce mosquito breeding and lower the risk of infection.
West Nile Virus Trends in Los Angeles County
Over the past five years, Los Angeles County has reported an average of 56 human cases of West Nile virus annually.
However, health officials believe the actual number of infections is significantly higher because most individuals experience mild or no symptoms and never seek medical care.
Public Health Message: Stay Alert, Stay Protected
With the confirmation of this year’s first West Nile virus cases, Los Angeles County officials emphasize the importance of ongoing prevention and awareness.
Reducing standing water, protecting your home, and avoiding mosquito bites remain the best ways to limit the spread of West Nile virus as mosquito season continues.
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