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'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. 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.

 

Symptoms

 

The reddening of the amphibian's legs and abdomen is due to the dilatation (or stretching) of the capillaries under its skin. The amphibian may even begin bleeding from the skeletal muscles, tongue or “third eyelid,” a protective skin fold under an amphibian's eyes. Other symptoms that may be observed include:

 

  • Anemia
  • Lethargy
  • Extreme weight loss
  • Open sores on the skin, nose, and toes that do not heal
  • Ascitis (collection of fluid in the abdominal cavity)

 

Causes

 

The bacterium Aeromonas hydrophila, which generally is the cause for “red-leg” syndrome, is found in contaminated food or water, and may also be airborne.

 

Diagnosis

 

Your veterinarian will look for signs of widespread infection, which could include inflammation or dead cells localized in the liver, spleen, and other abdominal organs. Blood or body fluid tests to detect the presence of the infectious-causing organism is also typically done.

 

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