Oxytetracycline, approved by the US government to combat citrus scourge, may not work—at least not as a spray.

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.

Mycale grandis teams up with microbes housed inside it to gather nutrients.

In Niger, fewer kids die when health workers administer azithromycin routinely, perhaps because of a shift in the composition of gut microbes.

The 12-year-long endeavor reveals Prometheoarchaeum as a tentacled cell, living in a symbiotic relationship with methane-producing microbes.

Studies point to the life-saving record of fecal transplants for patients infected with C. diff, despite a recent death. Doctors are now testing the procedure for other conditions.

Microbes that dwell in nutrient-poor waters use a photopigment called retinal to harvest energy from sunshine at levels at least equal to those stored by chlorophyll-based systems.

An Israeli lunar lander carrying the tiny animals crashed into the moon in April, and now scientists are trying to determine if the creatures are still alive.

Microbial species that are commonly associated with oral diseases in modern humans are unreliable proxies for determining tooth health status in ancient samples, a new study finds.