<qa>  How many patients will participate in this study?Three hundred patients 16 years of age or older will participate in this study. Participants will be randomly assigned to one of two groups: one-half will receive anidulafungin; the other half will receive fluconazole. They will receive the drug for as few as 10 days or for up to 42 days, depending on the seriousness of the infection. The drug will be given over a four-hour period on the first day, and over two hours on the remaining days. While taking the study medication, participants will be required to give blood samples every week until the end of treatment. At two weeks and six weeks following the end of therapy, participants will return for evaluation. 