Isolation and antifungal susceptibility testing of Trichosporon asahii in Ceará, Brazil / Isolamento e teste de susceptibilidade aos antifúngicos de Trichosporon asahii no Ceará, Brasil

Trichosporon spp. are yeasts capable of causing invasive disease, which mainly affect immunocompromised patients. A clinical strain of T. asahii was isolated from the blood cultures of patients admitted to the General Hospital of Fortaleza. Susceptibility tests were conducted by disk diffusion and broth microdilution. The isolated strain of T. asahii was resistant to fluconazole. The patient used amphotericin B and caspofungin in order to facilitate the microbiological cure. It was the first isolation and identification of T. asahii in blood culture in Ceará, Brazil.

Trichosporon spp. são leveduras capazes de causar doença invasiva, que afetam principalmente pacientes imunocomprometidos. Uma cepa clínica de T. asahii foi isolada em hemocultura de paciente internado no Hospital Geral de Fortaleza. Os testes de suscetibilidade foram realizados por difusão em disco e microdiluição em caldo. A cepa isolada do T. asahii foi resistente ao fluconazol, o paciente fez uso de anfotericina B e caspofungina então a cura microbiológica ocorreu. Foi o primeiro isolamento e identificação de T. asahii em hemocultura no Ceará, Brasil.

Examination of pH Tolerance Test of Two Alkalitolerant Yeasts / 微生物学通报

The purpose of this paper is to examine the pH adaptability range of two yeasts from our laboratory,and applied turbidimetry and Bradford methods to examine growth of Trichosporon asahii XJU-1 and Rhodotorula mucilaginosa XJU-1.It is shown that Trichosporon asahii XJU-1 grown between pH2.0 and pH13.0 and optimum pH is 8.0,whereas Rhodotorula mucilaginosa XJU-1 grown between pH3.0 and 12.0,optimum pH is 8.5.When turbidimetry was applied,it produced consensus results between pH4.0 and 10.0 with Bradford method.At the same time,produced senior distorted at pH