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Diagn Microbiol Infect Dis. 2002 May;43(1):13-7.

Antifungal activities of fluconazole, caspofungin (MK0991), and anidulafungin (LY 303366) alone and in combination against Candida spp. and Crytococcus neoformans via time-kill methods.

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College of Pharmacy, The University of Iowa, Iowa City, Iowa 52242, USA.


The activities of the echinocandins caspofungin and anidulafungin were evaluated alone and in combination with fluconazole using time-kill methods against isolates of Candida albicans, Candida glabrata, Candida tropicalis, Candida krusei, and Cryptococcus neoformans. Antifungal concentrations tested against each isolate were 0.5 microg/mL and 20 microg/mL of fluconazole and 0.007 microg/mL and 2 microg/mL of both caspofungin and anidulafungin. In addition, 20 microg/mL of fluconazole was tested with 2 microg/mL of caspofungin and anidulafungin to test for additive or antagonistic activity. Finally 0.5 microg/mL of fluconazole was tested with 0.007 microg/mL of caspofungin and anidulafungin to test for synergy. Combinations of fluconazole and caspofungin or anidulafungin resulted in indifference. Azole-echinocandin combinations do not produce antagonistic effects; therefore, combinations of these agents may warrant future clinical evaluation.

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