The Global Resurgence of African Swine Fever: A Comprehensive Review of Epidemiology, Pathogenesis, and Biosecurity Strategies
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Background: African swine fever (ASF) is a highly contagious and lethal viral disease of domestic and wild pigs that has re-emerged as a significant global threat to swine production and food security. The recent rapid and widespread dissemination of the virus, particularly across Asia and Europe, necessitates a comprehensive understanding of its complex epidemiology, pathogenic mechanisms, and effective control measures. This review synthesizes current knowledge to provide a holistic perspective on the factors driving the disease's global spread, it’s devastating impact, and the multifaceted strategies required for mitigation.
Methods: A systematic review of peer-reviewed literature, official reports, and databases was conducted. The analysis focused on the molecular and cellular pathogenesis of the African swine fever virus (ASFV), the diverse transmission routes, the role of different host species, and the efficacy of various biosecurity protocols. Key insights from supplementary data were also integrated to guide the narrative and address critical knowledge gaps.
Results: The review highlights the complex interplay between host, virus, and environmental factors in ASFV transmission, emphasizing the significant role of wild boar populations and inadequate biosecurity in facilitating its spread. The molecular pathogenesis reveals a sophisticated viral strategy for evading the host immune response. Furthermore, the analysis underscores the limitations of current diagnostic and surveillance tools in early detection and the absence of a commercially available vaccine as major challenges. The devastating socio-economic impacts on smallholder farmers and rural economies are also discussed.
Conclusion: The global spread of ASF is driven by a confluence of biological and anthropogenic factors. Effective control hinges on a multi-pronged strategy that includes enhanced biosecurity, robust surveillance, and international cooperation. The development of a safe and effective vaccine remains a top research priority. The findings suggest that a unified 'One Health' approach is essential to effectively manage and ultimately contain this persistent and evolving threat.