Research involving Danish babies’ dirty diapers has provided a plethora of information on previously unknown viruses — and the best view yet of the makeup of the infant gut microbiome.
looked at the feces of 647 healthy Danish 1-year-olds enrolled in a long-term asthma and chronic inflammatory disease study. The kids’ dirty diapers yielded a surprisingly diverse set of viruses — many of which have yet to be described by science. Overall, the researchers uncovered 10,000 viral species from 248 viral families; of those families, just 16 were already known.
The viruses were 10 times more abundant than the bacterial species in the children’s feces; 90 percent of them were bacteriophages, which attack bacteria instead of human cells. These bacteriophages don’t cause disease; instead, they are thought to shape bacteria’s competitive abilities and balance bacterial populations within the gut’s microbiome.
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