Emerging infectious diseases of chelonians.

Various new diseases have emerged in captive and wild populations of turtles and tortoises. Several of these seem to be on the rise and have the potential to cause widespread disease. This article reviews the current literature and authors' experience with intranuclear coccidiosis, cryptosporidium, iridovirus, and adenovirus. The biology, epidemiology, clinical signs, diagnosis, treatment, and pathologic changes are described for each disease.