Newly Identified Mirusviruses Reproduce in Nuclei of Unicellular Eukaryotes

Researchers have identified a new family of viruses, named mirusviruses, that reproduce within the nuclei of unicellular eukaryotes. The findings, published in *Nature Microbiology*, highlight previously unknown complexities in viral genome structures and replication mechanisms. This discovery sheds light on an unexplored aspect of viral diversity and evolution.

The study reveals that mirusviruses are widespread and demonstrate unique characteristics that distinguish them from other known viruses. These viruses exhibit intricate genome architectures and utilize novel replication strategies within their host cells’ nuclei. The research provides insights into how these viruses interact with their hosts at a cellular level, contributing to a broader understanding of virus-host dynamics in unicellular organisms.

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Date: November 28, 2025

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