Nutrafin Cycle is used to help establish high populations of nitrifying bacteria (the species that convert ammonia to nitrites and nitrates) in aquariums.  At a recent seminar sponsored by Hagen, the manufacturer, I learned that the product has been modified in several important ways. 
 
Cycle contains 5 strains of bacteria, in correct proportion of lithotrophic [...]

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Bacteria
Salmonella spp.
A variety of Salmonella species are commonly present in amphibian digestive tracts. Many are easily transmitted to humans and can cause severe health problems, especially among the young, elderly and immune-compromised. It is essential that you discuss with your family doctor the best methods of [...]

The prevention and treatment of disease in captive reptiles and amphibians has advanced greatly in recent years. Unfortunately, however, there is still a great deal that baffles us — our knowledge of amphibian medicine in particular is quite poor. On the positive side, we do know a quite a bit about the diagnosis and treatment [...]