Molecules produced by resident bacteria and their hosts may signal immune cells to attack the body’s own tissues.

In a study of nearly 400 breastfeeding mothers, researchers find links between directly feeding the child and a more diverse microbiota, compared to milk from pumping.

Researchers find that it’s not just high-risk genes, but how children’s bodies respond to their own intestinal microbiota that relates to future diagnoses of type 1 diabetes.

Small microRNA-containing particles found in the plant can boost populations of healthy gut bacteria, and even improve colitis symptoms in mice.

A review finds that for several conditions, poop from certain healthy people is more likely to provide relief for recipients.

A case study of two patients with advanced cancer shows it might be possible to avoid a common and severe side effect of immunotherapy treatment.

As people move to the United States from Southeast Asia, the microbes in their digestive tracts begin to Westernize, possibly explaining high rates of obesity and other metabolic issues in these immigrant populations.

Using wild mice housed in laboratory conditions, researchers find that gut bacteria compositions change little from one generation to the next.

Experiments in mice and people find that probiotic supplements don’t consistently change the composition of the gut microbiome, and may have adverse effects after antibiotics.