Microbial Pathogens in the Fungal Kingdom

Area of Science:

• Mycology and evolutionary biology
• Genomics and bioinformatics
• Pathogen research

Background:

• Fungi, closely related to animals, represent a vast kingdom with diverse forms and ecological roles.
• Their shared evolutionary history with metazoans makes them valuable models for mammalian biology but challenging to treat when pathogenic.
• Traditional fungal classification has been updated by genomic data, revealing a more complex phylogeny with multiple independent origins of virulence.

Purpose of the Study:

• To survey the diversity of fungal pathogens and explore key principles of fungal evolution and virulence.
• To illustrate how genomics is revolutionizing our understanding of the fungal kingdom and its pathogens.
• To investigate shared and divergent virulence strategies among successful animal fungal pathogens.

Main Methods:

• Genomic analysis of various fungal pathogens, including zygomycetes, dermatophytes, and Candida species.
• Comparative genomics to identify conserved and divergent pathways related to virulence.
• Phylogenetic analysis to understand the independent evolution of fungal virulence across different lineages.

Main Results:

• Fungal pathogens of vertebrates are distributed across multiple fungal phyla, indicating repeated independent evolution of virulence.
• Genomics provides insights into fungal sexual reproduction, sex determination, and the loss of conserved pathways in derived lineages.
• Successful human pathogens exhibit both shared and unique virulence strategies, including morphological transitions (dimorphism, trimorphism).

Conclusions:

• Fungal pathogens of animals have arisen multiple times independently throughout the fungal tree of life.
• Despite shared properties, each successful fungal pathogen possesses unique virulence strategies.
• Genomic approaches are crucial for unraveling the complexities of fungal pathogenesis and developing effective treatments.