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 male mosquitos. These mosquitos, carrying a sterilizing gut bacteria called Wolbachia, are being deployed not to target humans but to curb the virus spread by preventing the hatching of female mosquitos’ eggs.
Health authorities in the US are advising the public to use insect repellent and enhance mosquito-control measures due to the heightened West Nile virus activity. The US Centers for Disease Control and Prevention has reported a significant increase in cases, with 48 confirmed cases so far, including 38 severe cases by the end of June. This surge is notable compared to the average number of cases reported during the same period in previous years.
Individuals infected with the West Nile virus may experience mild symptoms like headaches, body aches, joint pain, vomiting, diarrhea, and rashes, with some cases leading to severe complications such as inflammation of the brain or spinal cord, particularly among older adults and individuals with underlying health conditions.
Bee Safe Mosquito Control, a Maryland-based company, is behind the release of these non-biting male mosquitos in Washington DC. By mating with female mosquitos, these males render the females infertile, thereby controlling the mosquito population. These specially bred mosquitos, known as “ZAP males,” are specifically targeting the Asian Tiger mosquito, which is known to transmit various diseases apart from West Nile virus.
This innovative mosquito control strategy has been successfully implemented in other countries, including South America, Singapore, and Australia. The company assures that eradicating the Asian Tiger mosquito, classified as a non-native invasive species, will not disrupt the local ecosystem.
Since its initial detection in New York in 1999, West Nile virus has spread throughout the United States, reaching its peak in 2003 with nearly 10,000 reported cases. This proactive approach aims to mitigate the impact of the virus and safeguard public health against mosquito-borne diseases.