Antifungal combination therapy in localized candidosis

Area of Science:

• Mycology
• Pharmacology
• Infectious Diseases

Background:

• Localized candidosis, mimicking thrush, presents treatment challenges.
• Developing effective antifungal strategies is crucial for combating Candida infections.

Purpose of the Study:

• To evaluate the efficacy of various antifungal combinations in a novel mouse model of localized candidosis.
• To assess the impact of antifungal combinations on drug-resistant Candida albicans strains.

Main Methods:

• Development of a mouse model using air-filled subcutaneous cysts to simulate localized candidosis.
• In vivo testing of different antifungal combinations, including flucytosine (5-FC) with amphotericin B (Amph B) or azoles.
• Evaluation of antifungal activity against Candida albicans strains with varying resistance levels to 5-FC.

Main Results:

• The combination of 5-FC and Amph B demonstrated the highest efficacy, exhibiting additive or synergistic effects.
• Combinations of 5-FC with imidazole or triazole derivatives showed lower efficacy, with additive effects being infrequent.
• Treatment with 5-FC + Amph B significantly reduced the emergence of 5-FC-resistant Candida albicans mutants.

Conclusions:

• Flucytosine and amphotericin B represent a highly effective combination for treating localized candidosis.
• This combination therapy shows promise in managing and preventing the development of antifungal resistance in Candida infections.