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Logo of procrsmedFormerly medchtJournal of the Royal Society of MedicineProceedings of the Royal Society of Medicine
 
Proc R Soc Med. 1977; 70(Suppl 1): 9–12.
PMCID: PMC1542859

The effects of miconazole on the ultrastructure of Candida albicans.

Abstract

Ultrastructural changes in Candida albicans induced by increasing concentrations of miconazole in vitro are described. Fungistatic concentrations (10(-8) to 10(-7) M) induced minimal morphologic changes at the cell periphery. At 10(-6) M cell volume increased and peroxisomes became numerous in the cell interior. The minimal fungicidal dose of 10(-5) M caused severe damage to most of the cell population and a total fungicidal dose of 10(-4) M caused total internal cellular necrosis even when cell walls remained intact. It is suggested that miconazole inhibits the peroxidative enzymes cytochrome c-peroxidase and catalase. Cell necrosis then results from peroxide accumulation.

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