By Stephanie PappasLiveScience A frog once widely imported and bred by hospitals because it lays eggs when injected with a pregnant woman's urine may have brought a deadly amphibian infection to the United States.African clawed frogs infected with the fungus Batrachochytrium dendrobatidis, or Bd, could have brought the fungus to California shores, according to a new study. The frogs, Xenopus laevi....