Novel Dolphin Tupavirus from Stranded Atlantic White-Sided Dolphin with Severe Encephalitis, Canada, 2024.

We sequenced a novel rhabdovirus, Tupavirus delphini (dolphin tupavirus), from the brain of a stranded dead Atlantic white-sided dolphin with severe encephalitis in Canada. In situ hybridization linked presence of the virus to the animal's brain pathology and death. Our findings underscore the importance of monitoring marine mammals for unexpected pathogens.