Parasites have been likened to "ecological dark matter"—an unseen force vital for sustaining life on earth as we know it, supporting ecosystems that are more diverse, more resilient, and more ...

In the fall of 1985, Scott L. Gardner found himself standing over his toilet bowl, fishing around in the squishy output of his empty bowels with a chopstick. He had recently returned to graduate ...

In those areas, these parasites infect millions and cause serious illness. But in the U.S., they have mostly flown under the radar — until now. At least 11 human-infecting trematodes use M ...

Testicular toxoplasmosis shows that parasites can invade human testes, but symptomatic disease is very rare. Studies to date that show defects in the sperm of infected men are too small to draw ...

More than 90% of popular freshwater fish in Southern California are carrying human-infecting parasites, researchers say. This poses a significant danger for those who like to eat freshly caught ...

More than 90% of popular freshwater game fish in Southern California contained an introduced parasite capable of infecting humans, according to a new study from researchers at UC San Diego’s Scripps ...

With parasites, we could learn which threatened species are keeping ecosystems ever-so-gently in balance, or which ones might be future human-killers. We also might not.