Trichosporon and Antifungal Resistance: Current Knowledge and Gaps
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Published on: December 28, 2017
Isabela Lima Miranda1, Nalu Teixeira Aguiar Peres1,2, Rafael Wesley Bastos2,3
1Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
Abstract:
Trichosporon spp. are ubiquitous environmental and emerging opportunistic fungi that can be part of the normal microbiota of the skin, vagina, and gastrointestinal tract in humans and other animals. In a state of microbiota imbalance, both immunocompromised and non-immunocompromised patients are susceptible to trichosporonosis, which can present as either superficial infections, such as White Piedra, or deep-seated infections, such as fungemia. Due to intrinsic resistance or limited efficacy reported with fluconazole, polyenes, echinocandins, and flucytosine, voriconazole is currently recommended in clinical guidelines. Biofilm formation and the overexpression of efflux pumps may contribute to this limited efficacy, but other resistance mechanisms have also been reported. The high antifungal resistance levels present in this genus highlight the urgent need for new therapeutic approaches and a better understanding of Trichosporon pathogenesis and the molecular mechanisms underlying this resistance. In this review, we discuss antifungal resistance and the mechanisms of this resistance in Trichosporon spp., addressing key points that require further investigation.
Insights
Trichosporon fungi cause infections like White Piedra and fungemia. High antifungal resistance necessitates new treatments and understanding of resistance mechanisms in Trichosporon spp.
Area of Science:
- Mycology
- Infectious Diseases
- Antimicrobial Resistance
Background:
- Trichosporon spp. are opportunistic fungi found in human microbiota.
- They cause superficial (White Piedra) and deep-seated infections (fungemia).
- Existing antifungals show limited efficacy against Trichosporon.
Purpose of the Study:
- To review antifungal resistance in Trichosporon spp.
- To explore the mechanisms underlying this resistance.
- To identify areas for future research in Trichosporon pathogenesis.
Main Methods:
- Literature review of antifungal resistance in Trichosporon.
- Analysis of reported resistance mechanisms.
- Discussion of clinical implications and future research directions.
Main Results:
- Trichosporon spp. exhibit high levels of antifungal resistance.
- Mechanisms include biofilm formation and efflux pump overexpression.
- Voriconazole is recommended, but resistance is a growing concern.
Conclusions:
- Significant antifungal resistance in Trichosporon spp. requires novel therapeutic strategies.
- Further research into resistance mechanisms is crucial for effective treatment.
- Understanding Trichosporon pathogenesis is key to combating infections.
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