Comparison between multiplex PCR and phenotypic systems for Candida spp. identification

Area of Science:

• Medical Mycology
• Clinical Microbiology
• Molecular Diagnostics

Background:

• Accurate identification of Candida species is crucial for effective antifungal treatment and infection control.
• Phenotypic methods for Candida identification can be slow and sometimes lack specificity.
• Molecular methods offer potential for faster and more accurate Candida species identification.

Purpose of the Study:

• To evaluate and compare the performance of three phenotypic identification systems (RapID Yeast, Vitek2 YST, API 20 C AUX) against multiplex PCR for Candida species.
• To assess the reliability and time-efficiency of multiplex PCR for routine Candida diagnostics.

Main Methods:

• Four hundred and fifty clinical isolates of Candida species were identified using three phenotypic systems and one multiplex PCR assay.
• Comparative analysis of identification results obtained from phenotypic methods and multiplex PCR.
• Specific evaluation of method performance for challenging species like Candida krusei.

Main Results:

• Multiplex PCR showed good overall agreement with phenotypic methods, with the highest correspondence (83.7%) observed with the API 20 C AUX system.
• Identification of Candida krusei presented challenges across all tested methods.
• Multiplex PCR demonstrated potential for being more rapid, sensitive, and cost-effective than other molecular methods.

Conclusions:

• Multiplex PCR is a reliable and time-saving alternative for Candida species identification in clinical diagnostics.
• While phenotypic methods have limitations, multiplex PCR offers advantages in speed and sensitivity.
• Further investigation into Candida krusei identification and resistance mechanisms is warranted.