Abstract
West Nile virus (WNV), a mosquito-borne illness traditionally limited to warmer regions, has been identified in mosquitoes in the UK for the first time, prompting significant concerns regarding emerging infectious threats in temperate climates. 1
A multitude of distinct climates and ecosystems plays a significant role in the emergence of various mosquito-borne diseases (MBDs), posing substantial challenges to public health. Consequently, vector-borne diseases such as chikungunya, dengue, and Crimean–Congo hemorrhagic fever (CCHF) remain a significant concern for public health. This underscores the necessity for additional research and the development of adaptive public health strategies to confront these evolving challenges, particularly in relation to the persistent threat of WNV. A significant consideration is climate change, as the seasonal monsoon rainfall and rising temperatures create optimal conditions for the proliferation of mosquito vectors. The spread of these diseases has also been aided by globalization, which has led to an increase in trade and travel. A coordinated approach is imperative to effectively mitigate the proliferation of this vector-borne disease.
WNV is a Flaviviridae encapsulated single-stranded RNA virus. Mosquitoes spread this arbovirus. The main vector is Culex mosquitoes. West Nile virus may infect people, birds, equines, dogs, and others. Wild birds may be the best hosts for viral transmission. Due of low and transient viral concentrations, humans are considered unintended dead-end hosts. Infected donor blood, organs, breast milk, or transplacental infection are rare transfer methods. 2 Myalgia, malaise, and low-grade fever are WNV symptoms. Headache, eye pain, emesis, anorexia, and a trunk maculopapular rash during defervescence may occur in up to 50%. Rarely, the virus may cause neurological symptoms such significant muscle weakness, mental state changes, seizures, or flaccid paralysis. WNV infection is hard to detect and may quickly cause brain damage and death. 3
WNV, initially discovered in Uganda in 1937, has spread across Africa, Europe, Asia, North America, Australia, and the Middle East. WNV adapts to different ecological conditions and spreads across continents, becoming a global health threat. The complex connections between environmental changes, host populations, and vector dynamics affect virus resistance and geographic dissemination, making it an important subject of research for novel infectious illnesses caused by global changes. WNV prevalence and intensity have increased in Europe and North America. 4 Environmental factors including milder winters and extended warm seasons enhance mosquito activity and transmission times. Research shows that WNV has adapted to overwinter in European mosquito populations, suggesting year-round transmission in certain temperate zones, which complicates control. Molecular advances in genomic and proteomic technologies have helped us understand WNV replication and pathogenic mechanisms, suggesting new therapeutic targets. 5 There is no approved vaccine for WNV in humans, although numerous possibilities are being studied. Severe WNV patients, particularly those with neurological symptoms, receive supportive treatment while research on antiviral medicines targeting specific viral life cycle stages continues. WNV management relies on mosquito control. Genetically modified mosquitoes and other insecticidal treatments may reduce transmission. Monitoring mosquito and bird populations with advanced technology helps anticipate epidemics and direct public health. 6 To address these complex issues, a One Health strategy that integrates human, animal, and environmental health is needed. However, climate change continues to affect mosquito vectors and WNV transmission. High temperatures may exacerbate heatwaves, which speed mosquito reproduction and expand their range. Urbanization and land use changes stress ecological balance, impacting vector populations and viral spread. Due to poor water management, stagnant water bodies in high-density metropolitan areas are ideal mosquito breeding grounds. WNV control requires adapting public health strategies to changing conditions. 7
Future endeavors must focus WNV research, vaccine and therapy development, and public health system strengthening for rapid response. WNV's proliferation into new regions and reemergence in previously impacted areas will need global collaboration. This comprehensive approach highlights the complex link between scientific research, public health policy, and community participation in tackling this health issue.
Footnotes
Ethical Considerations
No ethical approval has been taken because the study type did not involve any samples from humans or animals for any kind of experiments.
Data Availability Statement
Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.