RT Book, Section A1 Casadevall, Arturo A2 Kasper, Dennis L. A2 Fauci, Anthony S. SR Print(0) ID 1141412647 T1 CRYPTOCOCCOSIS T2 Harrison's Infectious Diseases, 3e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259835971 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141412647 RD 2024/04/20 AB Cryptococcus, a genus of yeast-like fungi, is the etiologic agent of cryptococcosis. Both species, C. neoformans and C. gattii, can cause cryptococcosis in humans. The two varieties of C. neoformans—grubii and neoformans—correlate with serotypes A and D, respectively. C. gattii, although not divided into varieties, also is antigenically diverse, encompassing serotypes B and C. Most clinical microbiology laboratories do not routinely distinguish between C. neoformans and C. gattii, or among varieties, but rather identify and report all isolates simply as C. neoformans.