I can't really answer your question, but Zapping would be a good place to start. Also do her kidney cleanse along with a parasite cleanse and bowel cleansing would probably be helpful. Maybe the fungus is caused by candida.
Something you might try is putting some green hulled Black-Walnut tincture on your feet along with taking it orally with some water. I used to get athletes foot every summer. I would put the tincture on my toes and take it internally daily and the itching would stop in about ten minute and the toes would clear up in about 5 to 7 days. I have done all of the cleanses mentioned above and I no longer get the athletes foot. What I did not know at the time was the walnut tincture is part of Dr. Clarks parasite cleanse protocol.