Time-kill curves were determined for three isolates of Candida albicans tested against fluconazole and amphotericin B at multiples of the MIC. Fluconazole produced fungistatic activity, with concentration-related growth effects observed over a narrow range of concentrations. Amphotericin B exhibited fungicidal activity, with enhancement of activity over a broader range of concentrations.

The in vitro activity of a new water-soluble polyene, SPA-S-843, was evaluated against 116 strains of Candida, Cryptococcus, and Saccharomyces spp. and compared with that of amphotericin B. SPA-S-843 demonstrated better inhibitory activity against all of the yeasts examined and better fungicidal activity against Candida albicans, Candida glabrata, Candida krusei, and Candida tropicalis than did...

LY303366 is a semisynthetic analog of the antifungal lipopeptide echinocandin B that inhibits (1,3)-beta-D-glucan synthase and exhibits efficacy in animal models of human fungal infections. In this study, we utilized flow cytometric analysis of propidium iodide uptake, single-cell sorting, and standard microbiological plating methods to study the antifungal effect of LY303366 on Saccharomyces c...

Amphotericin B (AMB), micafungin, and caspofungin MICs, minimal fungicidal concentrations, and time-killing curves were determined in the presence and absence of 10% inactivated serum. AMB was the only agent with consistent killing activity (time required to achieve 99.9% of growth reduction was 2.1 to 3.2 h). The presence of serum enhanced caspofungin activity but lowered those of micafungin a...

We studied the anti-Aspergillus activity of micafungin by using two fluorescent dyes to detect cell viability. Micafungin induced flattened hyphae, caused by the bursting of cells, which had lost their viability. Micafungin has killing activity against actively growing hyphae, even though it is not fungicidal against the whole burden of Aspergillus fumigatus.

The activity of omiganan pentahydrochloride (formerly MBI 226; a synthetic cationic peptide) was assessed against 1,437 recent clinical bacterial isolates and 214 recent clinical yeast isolates. The omiganan was highly active, and minimal bactericidal concentrations or minimal fungicidal concentrations were either equal to or two- to fourfold higher than MICs. Kill curve experiments showed a cl...