Dimorphic Fungal Pathogens in Human Infections
Summary
Dimorphic fungal pathogens are a unique group of organisms capable of switching between two distinct morphological forms—typically a multicellular filamentous mycelium in the environment and a unicellular yeast or yeast-like phase within the human host. This thermal dimorphism underpins their pathogenicity, as the environmental form survives in soil or other reservoirs and the host-adapted form thrives at human body temperature. Key genera include Histoplasma, Blastomyces, Coccidioides, Paracoccidioides and the more recently recognised Emergomyces and Emmonsia species. These agents are responsible for endemic mycoses with global distributions that reflect climatic, ecological and socioeconomic variables. Inhalation of airborne propagules initiates infection, which may range from asymptomatic or mild pulmonary disease in immunocompetent individuals to severe disseminated disease in the immunocompromised. Diagnostic challenges arise from nonspecific clinical presentation and the need for specialised laboratory culture or molecular techniques. Treatment relies on antifungal agents such as amphotericin B formulations and azoles, but emerging resistance and host toxicity remain critical issues. Climate change, expanding immunosuppressed populations and increasing international travel have broadened the geographic footprints and clinical significance of dimorphic mycoses. Ongoing research seeks to elucidate mechanisms of morphological switching, virulence determinants and improved diagnostic and therapeutic strategies to mitigate morbidity and mortality worldwide.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Dimorphic Fungal Pathogens in Human Infections publication trend
The graph below shows the total number of articles in dimorphic fungal pathogens in human infections across all publications each year (not limited to Nature Index journals).
Technical terms
Dimorphic: Able to grow in two distinct morphological forms depending on environmental conditions.
Thermal dimorphism: Morphological conversion triggered by temperature shifts, typically between environmental and host body temperatures.
Mycelium: The multicellular, filamentous growth form of fungi, composed of hyphae.
Yeast phase: The unicellular, often budding form adapted for growth within warm-blooded hosts.
Conidia: Asexual, non-motile spores produced by fungi for environmental dispersal.
Endemic mycosis: A fungal infection restricted to a specific geographic area where the pathogen is naturally present.
References
- Emergomycosis, an Emerging Thermally Dimorphic Fungal Infection: A Systematic Review. Journal of Fungi (2023).
- Phylogeny, ecology and taxonomy of systemic pathogens and their relatives in Ajellomycetaceae (Onygenales): Blastomyces, Emergomyces, Emmonsia, Emmonsiellopsis. Fungal Diversity (2018).
- Emerging Fungal Infections: New Patients, New Patterns, and New Pathogens. Journal of Fungi (2019).
About these summaries
This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.