[In vitro antifungal activity of amorolfine against Malassezia species].

In vitro antifungal activities of a new morpholine agent, amorolfine (MT-861) were investigated, against 39 strains of Malassezia furfur (11 stock cultures and 28 clinical isolates) and 8 strains (stock cultures) of Malassezia pachydermatis, in comparison with those of 2 reference drugs, clotrimazole (CTZ) and bifonazole (BFZ). Of the 3 antifungal agents, MT-861 exhibited strongest antifungal activities against the stock cultures of M. furfur and M. pachydermatis with average MIC values of 0.428 and 0.174 micrograms/ml, respectively; and the average BFZ activity was less than 1/10, and the average CTZ activity was 1/100, of the average MT-861 activity. All of the clinical isolates of M. furfur also showed high susceptibilities, though they were more susceptible to BFZ and CTZ.