Candidiasis, also called thrush or moniliasis, is a yeast infection. Candida albicans is an organism that normally makes a quiet home for itself on your skin and doesn't bother anyone. We all carry this organism on our skin, in our mouth, in our gastrointestinal tract (gut), and, in the case of women, in the vagina.
Occasionally the yeast multiplies uncontrollably, causing pain and inflammation. Candidiasis may affect the skin. This includes the external surface skin and the skin of the vagina, the penis, and the mouth. Candidiasis may also infect the blood stream or internal organs such as the liver or spleen. By far the most common problems are skin, mouth and vaginal infections. It also is a common cause of diaper rash. These can be bothersome infections, but are not life threatening.
Candidiasis can kill if it reaches the bloodstream or vital organs such as the heart, but this is rare even in people with damaged immune systems and is almost unheard of in healthy people. Nevertheless, candidiasis is a constant nuisance, and sometimes a serious threat to people with AIDS and some cancer patients who lack the immune resources to fight it.