Random amplified polymorphic DNA (RAPD) was optimized and used to dist
inguish between the varieties and serotypes of Cryptococcus neoformans
. The RAPD technique distinguished between serotypes A, D or AD within
C. neoformans var. neoformans, and revealed further differentiation w
ithin each serotype. Four RAPD profiles were clearly recognizable with
in C. neoformans var, gattii, although its two serotypes, B and C, wer
e only differentiated with one primer combination out of seven.