The researchers identified more than 450 possible phage sequences within the majority of the nearly 200 bacterial genomes that they examined. More than half of these viral sequences were not found in any databases, suggesting that they could be phages unique to the urinary tract.
"We find this time and time again," James says. "In all of the niches, there's so little known about viruses that every time you sequence any viral community, there's always a massive amount of novelty. It highlights how much we still don't know."