Since the mid-1990s, scientists have been trying to figure out what has been causing frogs around the United States and Canada to become deformed. Little progress has been made in sorting out which ...

The trematode has a complex life cycle that involves three host species, he said. In addition to the infectious stage in snails and the cyst stage in frogs, the parasites rely on predators including ...

Increases in the diversity of parasites that attack amphibians cause a decrease in the infection success rate of virulent parasites, including one that causes malformed limbs and premature death, says ...

Deformities in Pennsylvania wood frogs are linked to the combination of their infection by parasites and a weakening of their immune system caused by exposure to pesticides, according to a study by ...

Parasites give new meaning to the cliché “eat or be eaten.” Often their life cycle can be completed only if they are ingested by a host—multiple times for some—making the odds of their survival ...

For decades, scientists have observed a clear pattern across the natural world: biodiversity tends to be higher near the ...