Some of the more common amphibian diseases with bacterial etiologies include bacterial dermatosepticemia or red leg syndrome, flavobacteriosis, mycobacteriosis, and chlamydiosis.The most common viral diseases of amphibians are caused by the ranaviruses, which have an impact on many species of anurans and caudates.Mycotic and mycotic-like organisms cause a number of diseases among amphibians, including chytridiomycosis, zygomycoses, chromomycoses, saprolegniasis, and ichthyophoniasis.ycotic and mycotic-like organisms cause a number of diseases among amphibians, including chytridiomycosis, zygomycoses, chromomycoses, saprolegniasis, and ichthyophoniasis.