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 ...