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A Soluble Tetrazolium-Based Reduction Assay to Evaluate the Effect of Antibodies on Candida tropicalis Biofilms
Published on: September 16, 2022
[AmBisome, three challenges: Candida auris infection, central nervous system infection, and biofilm-associated
Alba Ruiz-Gaitán1, José Luis Del Pozo2
1Instituto de Investigación Sanitaria La Fe, Hospital Universitario y Politécnico La Fe, Valencia, España.
Abstract:
The treatment of invasive fungal infections remains a challenge, both for the diagnosis and for the need of providing the appropriate antifungal therapy. Candida auris is a pathogenic yeast that is responsible for hospital outbreaks, especially in intensive care units; it is characterized by a high resistance to the antifungal agents and can become multidrug-resistant. At present, the recommended antifungal agents for the invasive infections with this pathogen are echinocandins, always after carrying out an antifungal susceptibility testing. In case of no clinical response or persistent candidemia, the addition of liposomal amphotericin B or isavuconazole may be considered. Both fungal infection of the central nervous system and that associated with biomedical devices remain rare entities affecting mainly immunocompromised patients. However, an increase in their incidence in recent years, along with high morbidity and mortality, has been shown. The treatment of these infections is conditioned by the limited knowledge of the pharmacokinetic properties of antifungals. A better understanding of the pharmacokinetic and pharmacodynamic parameters of the different antifungals is essential to determine the efficacy of the antifungal agents in the treatment of these infections.
Insights
Treating invasive fungal infections, like those caused by multidrug-resistant Candida auris, is difficult. Understanding antifungal pharmacokinetics is crucial for effective treatment, especially for rare but severe cases like CNS infections.
Area of Science:
- Mycology
- Infectious Diseases
- Pharmacology
Background:
- Invasive fungal infections pose significant diagnostic and therapeutic challenges.
- Candida auris is a multidrug-resistant yeast causing hospital outbreaks, particularly in intensive care units.
- Treatment of rare but severe invasive fungal infections, such as CNS or device-associated candidemia, is complicated by limited pharmacokinetic data.
Purpose of the Study:
- To review the challenges in diagnosing and treating invasive fungal infections.
- To highlight the specific difficulties posed by Candida auris, including its antifungal resistance.
- To emphasize the need for better understanding of antifungal pharmacokinetics and pharmacodynamics for optimizing treatment efficacy.
Main Methods:
- Literature review on invasive fungal infections, Candida auris, and antifungal therapies.
- Analysis of current treatment guidelines and recommendations.
- Discussion of pharmacokinetic and pharmacodynamic considerations for antifungal agents.
Main Results:
- Echinocandins are first-line agents for Candida auris infections, requiring susceptibility testing.
- Liposomal amphotericin B or isavuconazole may be added for refractory cases.
- Increased incidence of CNS and device-associated fungal infections with high mortality has been observed, particularly in immunocompromised patients.
Conclusions:
- Effective management of invasive fungal infections requires accurate diagnosis and appropriate antifungal therapy.
- Antifungal susceptibility testing is essential for guiding treatment of Candida auris infections.
- Further research into the pharmacokinetic and pharmacodynamic properties of antifungals is critical for improving treatment outcomes, especially for complex and severe infections.
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