Everyone poops his or her own viruses

Intestinal denizens are unique to each person, genomics study suggests

Scientists have conducted a new kind of gut check — one that catalogs viruses found in the intestines of identical twins and their mothers.

The work suggests that each person has a distinctive mix of viruses in their feces, and that mix doesn’t change much over time, say researchers led by Jeffrey Gordon of Washington University School of Medicine in St.