Fungal-Host Interactions: We are studying the chytrid fungus Batrachochytrium dendrobatidis that has been implicated in the global decline of amphibians. Our particular interests are in studying essential components of early events of the fungal-frog interaction. Components of the chytrid virulence arsenal and how it survives in the absence of its host are of great interest. We have identified several proteases produced by the fungus and are also studying fungal developmental transitions (from motile zoospore to walled sporangium) in pathogenic and free-living contexts. We are also interested in biofilm formation of the fungus and its implications to survival and toxin resistance.