terbinafine and posaconazole

Forty-four isolates belonging to human pathogenic species of Lichtheimia were tested against nine antifungal agents by using the EUCAST methodology. No remarkable differences were found between the clinical species, although L. ramosa showed slightly higher MICs for all drugs. Amphotericin B was the most active drug. Among azole drugs, posaconazole had the best activity in vitro and voriconazole was inactive. Echinocandins showed activity for some isolates, suggesting a potential role in combination therapy.

Topics: Amphotericin B; Antifungal Agents; Humans; Microbial Sensitivity Tests; Mucorales; Pyrimidines; Triazoles; Voriconazole

We have determined the in vitro activities of amphotericin B (AMB), voriconazole, posaconazole (PSC), itraconazole (ITC), ravuconazole, terbinafine, and caspofungin against five strains of Cunninghamella bertholletiae and four of Cunninghamella echinulata. The best activity was shown by terbinafine against both species (MIC range = 0.3 to 0.6 μg/ml) and PSC against Cunninghamella bertholletiae (MIC = 0.5 μg/ml). We have also evaluated the efficacies of PSC, ITC, and AMB in neutropenic and diabetic murine models of disseminated infection by Cunninghamella bertholletiae. PSC at 40, 60, or 80 mg/kg of body weight/day was as effective as AMB at 0.8 mg/kg/day in prolonging survival and reducing the fungal tissue burden in neutropenic mice. PSC at 80 mg/kg/day was more effective than AMB at 0.8 mg/kg/day in reducing the fungal load in brain and lung of diabetic mice. Histological studies revealed an absence of fungal elements in organs of mice treated with either AMB at 0.8 mg/kg/day or PSC at 60 or 80 mg/kg/day in both models. ITC showed limited efficacy in both models. PSC could be a therapeutic option for the treatment of systemic infections caused by Cunninghamella bertholletiae.

Topics: Amphotericin B; Animals; Antifungal Agents; Caspofungin; Cunninghamella; Diabetes Mellitus, Experimental; Echinocandins; Itraconazole; Lipopeptides; Male; Mice; Microbial Sensitivity Tests; Mucormycosis; Pyrimidines; Thiazoles; Triazoles; Voriconazole

The antifungal susceptibility profiles of 77 clinical strains of Mucorales species, identified by internal transcribed spacer sequencing, were analyzed. MICs obtained at 24 and 48 h were compared. Amphotericin B was the most active agent against all isolates, except for Cunninghamella and Apophysomyces isolates. Posaconazole also showed good activity for all species but Cunninghamella bertholletiae. Voriconazole had no activity against any of the fungi tested. Terbinafine showed good activity, except for Rhizopus oryzae, Mucor circinelloides, and Rhizomucor variabilis isolates.

Topics: Amphotericin B; Antifungal Agents; DNA, Ribosomal Spacer; Microbial Sensitivity Tests; Mucorales; Triazoles

A microdilution method was used to test 11 antifungal drugs against clinical isolates of Fusarium thapsinum and three different phylogenetic clades of Fusarium verticillioides that were characterized by sequencing a region of the beta-tubulin gene. Terbinafine was the most-active drug against both species, followed by posaconazole against F. verticillioides.

Topics: Animals; Antifungal Agents; Drug Resistance, Fungal; Fusarium; Humans; Microbial Sensitivity Tests; Molecular Sequence Data; Mycoses; Naphthalenes; Sequence Analysis, DNA; Terbinafine; Triazoles; Tubulin