A review offers a glimpse of previously unconsidered variables that could hinder efforts to identify true correlations between disease and gut microbiome composition.

Tiny doses of maternal poo mixed with breast milk and given to Cesarean-born infants makes their gut microbiota resemble those of babies born vaginally.

A B-cell receptor critical for the production of a subset of intestinal antibodies has been pinpointed, but the function of those antibodies remains unclear.

The gut microbiome is more malleable in the first two years after birth, allowing probiotics to make their mark. Can we exploit this to improve infants’ health?

The microbial makeup of a newborn baby’s intestines has changed dramatically over the past 100 years, and we are now beginning to understand how and why this matters.

Most of the viruses present in people’s guts are bacteriophages, but how they interact with resident bacteria is still an open question.

Researchers find strains of the bacterium Klebsiella pneumoniae that produce high levels of alcohol in 60 percent of patients with the condition.

Research on hundreds of babies finds the delivery method is linked with a greater abundance of taxa more frequently seen in hospitals.

Physical activity, independent of diet, shifts the composition of bacteria in the intestines, spurring researchers to search for species that might provide benefits akin to working out.