Multidrug-Resistant Candida: Epidemiology, Molecular Mechanisms, and Treatment

Area of Science:

• Mycology
• Infectious Diseases
• Antimicrobial Resistance

Background:

• Invasive Candida infections pose significant morbidity and mortality risks, particularly in vulnerable patient populations.
• The therapeutic arsenal against these infections is limited, with few drug classes available.
• Antifungal resistance, both intrinsic and acquired, is a growing concern in Candida species.

Purpose of the Study:

• To review the mechanisms and drivers of antifungal resistance in invasive Candida infections.
• To highlight the increasing reports of multidrug resistance in key Candida species.
• To emphasize the importance of accurate diagnosis and antifungal stewardship.

Main Methods:

• Literature review of antifungal resistance mechanisms in Candida.
• Analysis of factors contributing to the emergence and spread of resistant strains.
• Discussion of diagnostic challenges and management strategies.

Main Results:

• Acquired antifungal resistance emerges due to selection pressure or transmission, with multidrug resistance increasing in Candida glabrata and Candida auris.
• Key drivers include widespread antifungal use, suboptimal drug levels, biofilm formation, and poor infection control.
• Specific mechanisms like DNA mismatch repair gene mutations may accelerate resistance acquisition in Candida glabrata.

Conclusions:

• Antifungal resistance in Candida is a critical challenge requiring improved diagnostics and management.
• Antifungal stewardship programs are essential to limit the emergence of multidrug resistance.
• Addressing drivers like suboptimal drug levels and infection control is crucial for patient outcomes.