In response to an early and severe West Nile virus season in the United States, Washington DC is witnessing the release of hundreds of thousands of mosquitos. These 600,000 male mosquitos, carrying a sterilizing gut bacteria called Wolbachia, are being introduced to combat the virus by targeting female mosquitos for reproduction. The eggs of the female mosquitos won’t hatch, aiding in population control.
Health officials are advising people to use bug spray and mosquito-control measures due to the alarming West Nile virus season. The US Centres for Disease Control and Prevention have confirmed 48 cases, with 38 being severe, as of June 30, well above the average reported cases by the same time in previous years. Twenty-three states have reported instances of West Nile virus, marking the highest number in a decade.
While many individuals may unknowingly contract the virus with mild symptoms like headaches, body aches, and joint pain, severe cases can lead to inflammation of the brain or spinal cord, particularly affecting adults over 60 and those with underlying health conditions.
Bee Safe Mosquito Control, a Maryland-based company, is spearheading the release of non-biting male mosquitos in Washington. These “ZAP males” are aimed at the Asian Tiger mosquito, a carrier of diseases like encephalitis, dengue, and yellow fever. This tactic, successfully utilized in South America, Singapore, and Australia, is considered safe for the ecosystem due to the invasive nature of the tiger mosquito.
The West Nile virus was first identified in the US in 1999 and has since spread across the nation. Following a peak in reported cases in 2003, efforts like the mosquito release initiative aim to mitigate the impact of the virus.
