Experiments in animals and observations in humans suggest that the amount of proline circulating in one’s plasma has a strong association with depression severity.

Researchers identify live bacteria in fetal guts, skin, lungs, and placentas that activate memory T cells, indicating that early exposure to microbes could help educate the developing immune system.

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

Antibiotics disrupt the immune response to the influenza vaccine in people who haven’t recently had exposure to the virus or immunization.

The microbiomes of men who have sex with men are associated with greater immune system activation and promote elevated rates of viral infection in vitro.

A new study finds that more than 200 human-targeted, non-antibiotic drugs inhibit the growth of bacterial species that make up part of the human microbiome.

Including microbiome composition in predictions of whether a person is obese can significantly improve their accuracy, according to an analysis.

Hundreds of samples from microbes living in the gut, skin, mouth, and vagina add to the human microbiome “fingerprint.” 

Meet Scientist to Watch Emily Balskus, who studies the microbes that inhabit humans.

Some of our resident viruses may be beneficial.

Byproducts of gut microbes in some 1-month–old babies trigger inflammation that is linked to later asthma development, researchers find.

The Scientist reviews Serendipity, Complexity, The Human Superorgasism, and Love and Ruin

Researchers detail the major factors shaping the microbiomes that surround us while we work.

Pooping into a petri dish is becoming standard practice as part of some college biology courses.

The White House announces a new effort to study diverse microbial communities around the planet.

A person likely carries the same number of human and microbial cells, according to a new estimate.

The causes and consequences of obesity are more complicated than we thought.