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RESEARCH ARTICLE

Morphogenesis and pathogenesis: control of cell identity in a dimorphic pathogen

Hayley E Bugeja A and Alex Andrianopoulos A B
+ Author Affiliations
- Author Affiliations

A Genetics, Genomics and Development
School of BioSciences
The University of Melbourne
Vic. 3010, Australia

B Tel: +61 3 8344 5164, Fax: +61 3 8344 5139, Email: alex.a@unimelb.edu.au

Microbiology Australia 36(2) 95-97 https://doi.org/10.1071/MA15031
Published: 19 March 2015

Abstract

Fungal pathogens span all major phylogenetic groupings within the fungal kingdom, infecting animals, plants and other fungi. Intrinsic to their ability to infect a host and survive host defense mechanisms is the capacity to produce the appropriate cell type. The link between morphogenesis and pathogenesis is clear for a number of pathogenic fungi that undergo a phase transition known as dimorphism (or dimorphic switching)1. Dimorphic fungi are able to alternate between multicellular filamentous growth, characterised by highly polarised hyphal growth, and unicellular growth with yeast cells dividing by budding or fission. This trait is strongly linked with virulence in the important human pathogens Blastomyces dermatitidis, Candida albicans, Coccidioides immitis/posadasii, Histoplasma capsulatum, Paracoccidioides brasiliensis/luttzii, Talaromyces marneffei (formerly named Penicillium marneffei) and Sporothrix schenckii1. Uncovering the mechanisms that control morphogenesis during dimorphic switching and the physiological properties of the hyphal and yeast cell types is crucial to understanding pathogenicity.


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