The authors report 5-fluorocytosine's activity against 101 Candida albicans and 42 Candida non-albicans strains. They point out the drug's lower inhibitory and lethal activity against Candida non-albicans. A 1.56 microgram/ml concentration inhibits 83% of Candida albicans while only 40% of Candida non-albicans is inhibited.