West Nile and Usutu Viruses Detected in Wild Carnivore Populations in the Netherlands

Researchers have identified molecular and serological evidence of West Nile virus (WNV) and Usutu virus (USUV) in wild carnivore populations across the Netherlands. The study, published in the journal *npj Viruses*, documents the presence of these flaviviruses in animals beyond their typical bird-mosquito transmission cycles, providing new data on how these pathogens circulate within the Dutch ecosystem.

The investigation highlights the role of wild carnivores as potential hosts for these viruses, which are traditionally maintained through interactions between avian species and mosquitoes. By analyzing biological samples from these animals, the research team confirmed that both WNV and USUV have successfully crossed into mammalian populations in the region. These findings offer insight into the ecological reach of the viruses, detailing how they move through local wildlife and expanding the current understanding of their transmission dynamics in Northern Europe.

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Date: July 11, 2026

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GOAI