Not sure if it helps with Candida, but since (I think) a lot bacteria and possibly fungus prefer acidic conditions, and Cesium Chloride is alkaline (high PH), it may help to get control over a candida infection by reducing the acidity of the environment in which candida thrives.
Cesium chloride is known more as a natural medicine, cancer therapy. It is a mineral found naturally in certain mountain waters with a higher PH and is connected to lower incidences of cancer in these regions.
Here is some more info on it:
According to Wikipedia Cesium Chloride has a relatively LOW toxicity.
The worst thing about cesium chloride is that it seems to cause a potassium deficiency which may explain some of the side effects in some who have used it (such as heart arrythmia). This is easily remedied by supplementing with potassium while on cesium treatment.
Here's some more info and some positive studies on the effectiveness and low toxicity of cesium chloride:
"Caesium chloride has a low toxicity to human and animals. Its median lethal dose (LD50) in mice is 2300 mg per kilogram of body weight for oral administration and 910 mg/kg for intravenous injection. The toxicity of CsCl is related to its ability to lower the concentration of potassium in the body and partly substitute it in biochemical processes." - http://en.wikipedia.org/wiki/Caesium_chloride#Toxicity