In cows’ guts, ciliates contain a tiny organelle called a hydrogenobody that may drive production of methane, a potent ...

While most known protozoa are classified as parasites, several lesser-known species can live in symbiotic relationships with their animal hosts. "Our aim was to understand how commensal protozoan ...

The trillions of microbes in the gastrointestinal tract, known as the gut microbiome, have a major impact on human health and disease. These microbes help us digest food and absorb nutrients; they can ...

Parasite extinction will have lasting and far-reaching consequences for biodiversity, and subsequently for humans. Kelly Speer Bat ticks (Ornithodoros) under a microscope. These parasites primarily ...

Warming temperatures in one part of the world seem to have driven down the parasite population, suggesting another unexpected way that climate change harms ecosystems. By Rachel Nuwer Most people ...