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Published on: March 11, 2022
The Sweet Side of Fungal Infections: Structural Glycan Diversity and Its Importance for Pathogenic Adaptation
Israel Diniz-Lima1, Leonardo Marques da Fonseca1, Jhenifer Santos Dos Reis1
1Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-170, Brazil.
Abstract:
Fungal infections are the most common secondary infections in debilitated individuals in a state of chronic disease or immunosuppression. Despite this, most fungal infections are neglected, mainly due to the lower frequency of their more severe clinical forms in immunocompetent individuals with a healthy background. However, over the past few years, several cases of severe fungal infections in healthy individuals have provoked a change in the epidemiological dynamics of fungal infections around the world, both due to recurrent outbreaks in previously infrequent regions and the greater emergence of more pathogenic fungal variants affecting healthy individuals, such as in the Cryptococcus genus. Therefore, before the arrival of a scenario of prevalent severe fungal infections, it is necessary to assess more carefully what are the real reasons for the increased incidence of fungal infection globally. What are the factors that are currently contributing to this new possible epidemiological dynamic? Could these be of a structural nature? Herein, we propose a discussion based on the importance of the virulence factors of glycoconjugate composition in the adaptation of pathogenic fungal species into the current scenario of increasing severity of these infections.
Insights
Severe fungal infections are increasing globally, even in healthy individuals. This study discusses how fungal virulence factors, particularly glycoconjugate composition, may drive this trend and impact adaptation.
Area of Science:
- Mycology
- Infectious Diseases
- Epidemiology
Background:
- Fungal infections are common secondary infections in immunocompromised individuals.
- Severe fungal infections in healthy individuals are increasing, altering global epidemiological dynamics.
- Emergence of more pathogenic fungal variants, like *Cryptococcus*, affects healthy populations.
Purpose of the Study:
- To investigate the reasons behind the rising incidence of fungal infections globally.
- To explore the factors contributing to the changing epidemiological dynamics of fungal infections.
- To discuss the role of fungal virulence factors, specifically glycoconjugate composition, in adapting to current infection severity.
Main Methods:
- Literature review and discussion of existing data on fungal infections.
- Analysis of epidemiological trends and emerging pathogenic fungal variants.
- Exploration of the structural and molecular basis of fungal virulence.
Main Results:
- Fungal infections are shifting from primarily affecting debilitated individuals to impacting healthy populations.
- Increased pathogenicity and geographic spread of fungal species are observed.
- Glycoconjugate composition is highlighted as a critical factor in fungal adaptation and virulence.
Conclusions:
- The increasing severity of fungal infections necessitates a re-evaluation of their global incidence.
- Virulence factors, particularly those related to glycoconjugate composition, are crucial for fungal adaptation and pathogenesis in diverse hosts.
- Understanding these factors is essential for anticipating and managing future fungal infection scenarios.
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