Gut Virus Linked to Colorectal Cancer

A new virus, previously unknown, has been discovered within common gut bacteria and is linked to colorectal cancer. Researchers at the University of Southern Denmark found that patients diagnosed with this cancer were more likely to have the virus than those without it.

This finding could pave the way for enhanced colorectal cancer screening methods. The team is exploring whether tests for this virus could facilitate earlier detection, a crucial step as early diagnosis dramatically improves survival rates and allows for the removal of precancerous growths.

Initial studies analyzing genetic material from bacteria in Danish patients and stool samples from nearly 900 individuals across the U.S., Europe, and Asia revealed that those with colorectal cancer were about twice as likely to have traces of these viruses. The virus alone could identify around 40 percent of cancer cases in preliminary analysis.

While still too early for diagnostic tests, researchers are investigating the virus's interaction with gut tissue and bacteria. They are also examining its presence in tumors and its effect on cancer development in mice. Colorectal cancer, expected to cause over 55,000 deaths in the U.S. this year, is the second most common cancer, with rates rising in younger adults.