Mold is a kind of fungus, usually healthy people have no dysfunction in the flora, usually rarely infected with mold. Easily infected with mold one is the long-term use of hormones, resistance is relatively low, easy to get mold; another is diabetic patients, blood sugar control is not good also easy to get a variety of infections, especially diabetic ketoacidosis patients. There is also the tumor population, because tumor patients have lower resistance, nutritional status is not good, the use of chemotherapeutic drugs, the white blood cell reduction, the overall defense ability is greatly reduced. There are also multiple infections after the broad-spectrum use of antibiotics, these patients use a variety of antibiotics, the body’s normal flora disorders, the normal flora of the formation of the barrier has also been damaged, repeated use of antibiotics, good bacteria are also killed, mold has a condition to get to the continuous reproduction and occurrence.