While analyzing the genomes of single-celled microbes, a team of researchers made a startling discovery: Thousands of previously unknown viruses were “hidden” within the microbes’ DNA.
The researchers found DNA from more than 30,000 viruses built into genomes of various single-celled microbes, they report in a new study. They explain that viral DNA might enable a host cell to replicate complete, functional viruses.
“We were very surprised by how many viruses we found through this analysis,” says lead author Christopher Bellas, an ecologist who studies viruses at the University of Innsbruck in Austria. “In some cases, up to 10 percent of a microbe’s DNA turned out to consist of hidden viruses.”
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