Redleg disease is caused by-
Red-leg' Syndrome in Amphibians. "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
Pseudomonas
Moudly sugar cane fibre
Coniosporium
Aeromonas
Misc.