Animal (non-human) reservoirs consist of domesticated and wild animals infected by pathogens. For example, the bacterium "Vibrio cholerae", which causes cholera in humans, has natural reservoirs in copepods, zooplankton, and shellfish. Parasitic blood-flukes of the genus "Schistosoma", responsible for schistosomiasis, spend part of their lives inside freshwater snails before completing their life cycles in vertebrate hosts. Viruses of the taxon "Ebolavirus", which causes Ebola virus disease, are thought to have a natural reservoir in bats or other animals exposed to the virus. Other zoonotic diseases that have been transmitted from animals to humans include: rabies, blastomycosis, psittacosis, trichinosis, cat-scratch disease, histoplasmosis, coccidiomycosis and salmonella.