Many people with candida do not realize it originated from mold exposures in their breathing environments. Yeast was one of the molds in the air samples of my apartment, where the mold devastated my health. It is a HUGE problem across the country, especially in old schools. It is often in the walls, ceilings, floor where it is not visible. Anywhere there has been a leak. Many people with candida email me when they realize their candida is related to the mold in their home. During the five years of extensive research on how mold effects the human body, one of the best papers I have found on the far reaching effects of yeast and other molds is this one: http://drcranton.com/CFIDS.htm .