Which one of the following statements about HIV and Candida albicans co-infection is incorrect?

A、It mainly causes thrush and esophagitis;
B、Thrush in adults could be a sign of HIV infection onset;
C、For simple oral infections, the clinical symptoms are leukoplakia on the lingual surface and oral mucosa. There may be no other symptoms;
D、Diagnosis of Candida albicans infection mainly depends on clinical manifestations;
E、Oral administration of Fluconazole capsules can be used for routine prevention