West Nile virus is hitting hard this year. Health officials report cases are up by 40% compared to previous years. By early September, there were over 770 reported cases, including about 490 severe ones. Typically, around 550 cases—350 of which are severe—are noted by this time.
Health officials are sounding the alarm, as most cases emerge in August and September. Dr. Robbie Goldstein, Massachusetts’ public health commissioner, emphasized the seriousness of the issue, highlighting that many mosquitoes in the state are infected.
To protect yourself, wear long sleeves and pants when outside. Using an EPA-registered insect repellent can also help keep you safe.
Historically, West Nile virus first appeared in the U.S. in 1999 in New York. It gradually spread, peaking in 2003 with nearly 10,000 cases reported. Scientists estimate that tens of thousands of people may be infected yearly without even knowing it, as some only experience mild symptoms like headaches, body aches, or rashes. However, severe cases can lead to serious complications, including inflammation of the brain or spinal cord, and in some instances, death.
Over the past decade, the average has been about 2,000 cases yearly, with around 1,200 resulting in severe neurological illness and about 120 deaths. Sadly, this year looks more daunting. Although exact numbers are still pending, officials note that mortality rates may be higher.
Interestingly, the rise in infection isn’t due to an increase in mosquito populations but rather a higher percentage of mosquitoes carrying the virus. Weather conditions, including temperature and rainfall, can influence mosquito infection rates. In Colorado, a state often affected by West Nile virus, there have been around 150 cases reported this year—more than double the cases seen in other states.
One particularly concerning area is Fort Collins, where recent data showed that 35 out of every 1,000 female mosquitoes were infected. This rate is significantly above the usual expectation of 8 per 1,000. Roxanne Connelly, a CDC entomologist, noted that the warmer and wetter year could explain this spike.
As we navigate this intense year, awareness and prevention are key. Understanding the risks and taking simple steps can dramatically reduce the chances of infection. Keep informed about local mosquito activity and stay safe!
For more in-depth information on West Nile virus, visit the CDC’s resources.
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Insects, Health, West Nile virus, Article, 125457723
