Gaining Insights from Candida Biofilm Heterogeneity: One Size Does Not Fit All

Area of Science:

• Mycology
• Infectious Diseases
• Microbiology

Background:

• Fungal infections, especially those caused by *Candida* species, pose a significant health burden but are often under-appreciated.
• The rise of antibiotic use and medical devices creates opportunities for pathogenic fungi to form biofilms, a key virulence factor.
• While *Candida albicans* is a primary biofilm producer, non-*Candida albicans* species (NCAS) and interkingdom interactions are increasingly recognized.

Purpose of the Study:

• To review recent advances in understanding fungal biofilms, focusing on the importance of clinical isolates.
• To explore the heterogeneity of *Candida* biofilms and its impact on patient outcomes.
• To highlight how studying clinical isolates provides insights beyond laboratory strains.

Main Methods:

• Literature review of recent studies on fungal biofilms and clinical isolates.
• Analysis of molecular approaches and their limitations in representing clinical reality.
• Synthesis of findings related to biofilm structure, development, and host interactions.

Main Results:

• Classical molecular studies using lab strains offer foundational knowledge but may not fully capture clinical diversity.
• Clinical isolates exhibit inherent biological heterogeneity, contributing to differential patient responses.
• Understanding this heterogeneity is crucial for effective diagnosis and treatment of fungal infections.

Conclusions:

• Working with clinical isolates is essential for a comprehensive understanding of fungal biofilm pathogenesis.
• The heterogeneity of *Candida* biofilms and NCAS is a critical factor in clinical outcomes.
• Future research should prioritize clinical isolate-based studies to bridge the gap between laboratory findings and patient care.