Orthoflavivirus-associated neurological disease in a UK horse.

Orthoflavivirus must be considered in equine neurological cases in the UK.

This case report documents orthoflavivirus infection presenting as neurological disease in a horse located in south-west England. Orthoflaviviruses, including West Nile virus and related arboviral pathogens, are emerging threats to equine health in Europe. The case discusses the clinical presentation of neurological signs, the diagnostic investigation pathway employed, and the approach to confirming orthoflavivirus etiology. The authors provide insights into the clinical manifestations, which likely included signs consistent with viral encephalitis such as altered mentation, ataxia, or other neurological deficits. The diagnostic approach presumably involved serological testing, molecular diagnostics, or both to identify the causative orthoflavivirus. This case is significant for raising awareness among UK veterinarians regarding the presence of these emerging neurotropic viruses and the importance of including arboviral diseases in the differential diagnosis for equine neurological cases in the UK. The report contributes to the epidemiological understanding of orthoflavivirus distribution and highlights the need for appropriate diagnostic protocols and potential prevention strategies in equine medicine.

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