Novel Hantavirus Detected in Australian Dolphins
Researchers have detected a new hantavirus in the lung tissue of two diseased Australian dolphins, confirmed through genomic analysis. Phylogenetic analysis placed the virus within the genus Mobatvirus, a group previously associated with insectivores and other small mammals. The finding challenges the assumption that hantaviruses are limited to terrestrial mammals and raises questions about marine mammals as disease surveillance sentinels.
A study posted to bioRxiv reports the discovery of a novel hantavirus in lung tissue samples taken from two Australian dolphins that showed signs of disease and histopathological changes — meaning detectable tissue damage visible under microscopy. Genomic characterization and phylogenetic analysis placed the virus within the genus Mobatvirus, situating it within a broader family of hantaviruses known to infect a range of mammalian hosts. The discovery is significant because hantaviruses have historically been associated with terrestrial mammals, particularly rodents, making infection in cetaceans — an aquatic mammal group — an unexpected finding. The authors suggest this expands the known ecological and host range of hantaviruses in meaningful ways. The research also proposes that marine mammals could serve as 'One Health' sentinels, meaning their health status may reflect broader environmental and zoonotic disease risks relevant to humans and ecosystems. The study is currently a preprint and has not yet undergone formal peer review.
What's missing
As a preprint, this study has not yet been peer-reviewed, and key limitations are not detailed in the abstract: it is unclear whether the hantavirus was confirmed as a causative agent of disease in the dolphins or merely detected as an incidental finding, the transmission route and reservoir host remain unknown, and no assessment of zoonotic risk to humans is provided.
What different sources said
- bioRxivCenter
Detection and genomic characterisation of a novel hantavirus in Australian dolphins
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