摘要
Identification of Cryptococcus neoformans(C neoformans) has been considered depends on the phenotype and biochemical characteristics, especially on its urease positive characteristics During the last ten years, there are 4 strains of urease negative C neoformans strains have been discovered, of which 2 were isolated from AIDS patients, 1 from pigeon dropping and another 1 from preserved cultures of 286 strains of C neoformans So far, from medlines, there was none of urease negative strain isolated clinically from non AIDS patient was report Recently, we isolated a strain of urease negative strain of C neoformans from neither AIDS nor immunocompromised patients for the first time
