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Rapid identification of Sporothrix schenckii in biopsy tissue by PCR
1Affiliated Hospital of Dalian Medical University, Dalian, ChinaHospital of Jilin University, Jilin, China.
Background:
The dimorphic fungus Sporothrix schenckii is the etiological agent of sporotrichosis, an important cutaneous mycosis with a worldwide distribution. At present, it is challenging to rapidly discover and identify Sporothrix schenckii in biopsy tissues nowadays.
Aims:
To explore new methods for rapid diagnosis of sporotrichosis.
Materials And Methods:
We screened specific primers for Sporothrix schenckii using 50 clinical isolates from patients with sporotrichosis. DNA was extracted from the lesions of 30 cases of clinically suspected sporotrichosis using the Graham s method of CTAB and amplified by PCR using the screened specific primers.
Results:
The primer S2-R2 was applicable for the identification of S. schenckii from different geographic areas and clinical types with high specificity and sensitivity. Twenty-five out of the thirty cases (83.3%) amplified using the primer S2-R2 showed positive bands. Further positive bands were observed in 95.6% of cases tested positive by fungal culture.
Conclusions:
Using the PCR technique and specific primers, we developed a new diagnostic method that can rapidly diagnose sporotrichosis with tissues obtained from clinical biopsies.