In vitro antifungal activity of amphotericin B and 11 6 7 comparators against Aspergillus terreus species complex

Aspergillus terreus infections are difficult to treat because of the intrinsic resistance to
33 Research Center, School of Medicine,
34 Mazandaran University of Medical Sciences, amphotericin B, and higher mortality compared to infections caused by other Aspergillus
35 Sari, Iran. species. The aim of the present study was to determine the in vitro antifungal activity
36
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of amphotericin B and 11 comparators against clinical (n = 36) and environmental
37 Funding information (n = 45) A. terreus isolates. In vitro antifungal susceptibility was performed using the
38 Mazandaran University of Medical Sciences,
CLSI M38--A2 procedure. Amphotericin B exhibited the highest MICs (MIC range,
39 Grant/Award Number: 2206
40 0.125--4 μg/mL; MIC90, 2 μg/mL), followed by terbinafine (MIC range, 0.002--1 μg/mL;
41 MIC90, 1 μg/mL). Only one isolate (1/81) showed amphotericin B MIC above the epi-
42 demiologic cut--off value (ECV; 4 μg/mL). None of the isolates had a MIC of≥ECV for
43 voriconazole, itraconazole and posaconazole. The reasons for the difference in am-
44 photericin B susceptibility patterns between studies remain unknown. The genetic and
45
species diversity, clinical, environmental and ecological factors in Terrei section on
46
various amphotericin B susceptibility profiles in different countries should be consid-
47
ered more as the main reasons associated with these differences.