E. L. Bull D. E. Green Jay Bowerman M. J. Adams A. Hyatt W. Wente Christopher A. Pearl 2007 <p>Chytridiomycosis (infection by the fungus <i>Batrachochytrium dendrobatidis</i>) has been associated with amphibian declines in at least four continents. We report results of disease screens from 210 pond-breeding amphibians from 37 field sites in Oregon and Washington. We detected <i>B. dendrobatidis</i> on 28% of sampled amphibians, and and we found _-^&gt; 1 detection of <i>B. dendrobatidi</i>s from 43% of sites. Four of seven species tested positive for <i>B. dendrobatidis</i>, including the Northern Red-Legged Frog (<i>Rana aurora</i>), Columbia Spotted Frog (<i>Rana luteiventris</i>), and Oregon Spotted Frog (<i>Rana pretiosa</i>). We also detected <i>B. dendrobatidis</i> in nonnative American Bullfrogs (<i>Rana catesbeiana</i>) from six sites in western and central Oregon. Our study and other recently published findings suggest that <i>B. dendrobatidis</i> has few geographic and host taxa limitations among North American anurans. Further research on virulence, transmissibility, persistence, and interactions with other stressors is needed to assess the potential impact of <i>B. dendrobatidis</i> on Pacific Northwestern amphibians.</p> application/pdf 10.1670/0022-1511(2007)41[145:OOTAPB]2.0.CO;2 en Society for the Study of Amphibians and Reptiles Occurrence of the amphibian pathogen Batrachochytrium dendrobatidis in Pacific Northwestern USA article