Strains belonging to the species W. anomalus, W. saturnus var. mrakii, C. lusitaniae, C. albicans, and C. glabrata were used in this study. W. anomalus 1F1 isolated from P. perniciosus , W. anomalus ATCC 96603 (a KT-producing strain formerly referred to as UP25F) , and Williopsis saturnus var. mrakii MUCL 41968  were used for the production of Wa1F1-KT, Wa96603-KT, and Wm41986-KT, respectively. The KT non-producing, KT-susceptible, W. anomalus UM3 strain was also used in this study as a negative control for KT expression .