Scientists have long known that the human body coexists with trillions of individual germs, what they call the microbiome. Until now, they’ve mostly studied those that cause disease: You may recall ...

For decades, textbooks and public-health campaigns repeated a striking claim: bacterial cells in the human body outnumber human cells by a factor of ten to one. That figure, repeated so often it ...

Some bacteria, among the deadliest in the world, seek out blood in the body like microscopic vampires, researchers say. National Cancer Institute via Unsplash Dracula. Edward Cullen. Morbius. Count ...

Bacteria use multiple defense mechanisms to survive in the host body. Shigella bacteria that cause colitis disable multiple host defense pathways using three specialized effector proteins, as reported ...

From our nose to our lungs to our guts, the human body is home to a diverse range of microorganisms. Such rich microbial ecosystems are prime hunting grounds for viruses that infect and kill bacteria.

Antibiotics are a double-edged sword—they should be as toxic as possible to pathogenic bacteria while being harmless to the cells of the human body. An international research team led by the Helmholtz ...

One of the most diverse ecosystems on the planet is closer than you think—right inside your mouth. Your mouth is a thriving ecosystem of more than 500 different species of bacteria living in distinct, ...

Per- and polyfluoroalkyl substances (PFAS)—the so-called “forever chemicals”—have long been known to accumulate in the human body, raising alarms due to links with decreased fertility, cardiovascular ...