Background: Adherence is considered a major virulence trait of Candida albicans. FK463 is a new investigational intravenous antifungal of the ‘candin family’ with potent in vitro and in vivo activity against Candida spp. Objective: The aim of the present study was to investigate the effect of Micafungin (FK463) on Candida adherence to epithelial cells of azole-sensitive and azole-resistant C. albicans isolates. Methods: An in vitro assay using microtest plate technology and fluorescence measurement was developed to compare the adherence of C. albicans SC5314 and of paired C. albicans isolates to epithelial cells in the presence and in the absence of FK463. Results: FK463 showed a marked inhibitory effect on the adherence of C. albicans SC5314. The addition of FK463 reduced the adherence of C. albicans SC5314 to 90% of the value of control without drug. A dose-dependent adherence inhibition was observed with FK463 in the range of 10–0.015 µg ml–1. The comparison of paired C. albicans isolates, either a fluconazole-susceptible and a fluconazole-resistant isolate of one patient, revealed no significant difference in the adherence behavior between azole-susceptible and azole-resistant. Conclusion: Micafungin (FK463) has the capacity to reduce adherence of C. albicans azole-susceptible and azole-resistant strains to epithelial cells.

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