Abstract

Early detection of emerging foreign animal diseases is critical to pathogen surveillance and control programs. Rift valley fever virus (RVFV), Japanese encephalitis virus (JEV), and African swine fever virus (ASFV) represent three taxonomically and ecologically diverse vector-borne viruses with the potential to be introduced to the United States. To promote preparedness for such an event, we reviewed the current surveillance strategies and diagnostic tools in practice around the world for these emerging viruses, and summarized key points pertaining to the availability of existing guidelines and strategic approaches for early detection, surveillance, and disease management activities. We compare and contrast the surveillance and management approaches of these three diverse agents of disease as case studies to emphasize the importance of the ecological context and biology of vectors and vertebrate hosts. The information presented in this review will inform stakeholders of the current state of surveillance approaches against these transboundary foreign animal disease which threaten the United States.

Highlights

  • Rift Valley fever virus (RVFV), African swine fever virus (ASFV), and Japanese encephalitis virus (JEV), are three vector-borne veterinary pathogens with the potential to invade the United States (US)

  • While all three of these pathogens are arthropod-borne viruses, the unique biology of these three systems demonstrates that there is no single approach for the surveillance and diagnostics

  • The National Veterinary Services Laboratories (NVSL) system, including the over 60 NAHNL labs and the Foreign Animal Disease Diagnostic Laboratory (FADDL) will play a critical role in the diagnostic testing and confirmation of these disease agents

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Summary

INTRODUCTION

Rift Valley fever virus (RVFV), African swine fever virus (ASFV), and Japanese encephalitis virus (JEV), are three vector-borne veterinary pathogens with the potential to invade the United States (US) All of these viruses are notifiable animal diseases [1], and Rift Valley fever (RVF) is included on the “World Health Organization (WHO) Blueprint of priority pathogens” [2]. While these viruses would all have devastating health and economic impacts, the ecological context and potential transmission dynamics of each are quite different and would require unique preparedness and mitigation efforts. Routes of potential entry into the US span importation of infected vectors (all three agents), viremic travelers (RVFV), infected animal products (ASFV), or contaminated fomites

Yes Yes Mosquitoes Yes Birds Pigs Mosquitoes
RIFT VALLEY FEVER VIRUS
African Swine Fever Virus
Diagnostic Tools
JAPANESE ENCEPHALITIS
AFRICAN SWINE FEVER
DISCUSSION
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