Rödben?

Finns en hel del info om du söker på "red leg amphibians", Kopierar från petmd:

"“Red-leg” syndrome is a widespread infection seen in frogs, toads, and salamanders. It is recognized by the redness on the underside of the amphibian's legs and abdomen, and is generally due to Aeromonas hydrophila, an opportunistic bacterial pathogen. However, viruses and fungi may also cause similar reddening. Underfed, newly acquired amphibians that are kept in poor-quality water or other less-than-ideal environmental conditions are particularly susceptible to “red-leg” syndrome."