%A Li,Ying %A Wang,He %A Hou,Xin %A Huang,Jing-Jing %A Wang,Pei-Chang %A Xu,Ying-Chun %D 2020 %J Frontiers in Microbiology %C %F %G English %K non-Aspergillus molds,IDENTIFICATION,MALDI-TOF MS,Antifungal susceptibility testing,Sensititre yeastone %Q %R 10.3389/fmicb.2020.00922 %W %L %M %P %7 %8 2020-June-03 %9 Original Research %# %! identification and antifungal susceptibility testing of non-Aspergillus molds %* %< %T Identification by Matrix-Assisted Laser Desorption Ionization–Time of Flight Mass Spectrometry and Antifungal Susceptibility Testing of Non-Aspergillus Molds %U https://www.frontiersin.org/articles/10.3389/fmicb.2020.00922 %V 11 %0 JOURNAL ARTICLE %@ 1664-302X %X Non-Aspergillus molds including Mucorales, Fusarium, and Scedosporium, etc. are emerging pathogens leading to higher mortality in immunocompromised patients. Fifty-two isolates of genetically confirmed non-Aspergillus molds representing 16 species from 8 genera were collected to evaluate the performance of the Bruker matrix-assisted laser desorption ionization–time of flight mass spectrometry (MALDI-TOF MS) in identification of non-Aspergillus molds. Antifungal susceptibilities were determined through the Clinical & Laboratory Standards Institute (CLSI) M38-A2 broth microdilution method and the Sensititre YeastOne colorimetric method. Bruker MALDI-TOF MS identified 57.7% (30/52) of isolates cultured in broth and 15.4% (8/52) of isolates cultured on solid agar media to the species level, respectively, according to standard interpretation criteria. Lowering the species level cut-off value (COV) from ≥2.0 to ≥1.7 could improve the MALDI-TOF MS species-level identification rate to 67.3% (38/52) for isolates cultured on solid media, with a slight increase of false identification rate of 2.6% (1/38). Amphotericin B was the most in vitro fungistatic-active agent for 98.1% (51/52) of the tested non-Aspergillus molds, with minimum inhibitory concentrations (MICs) of ≤2 μg/mL. The susceptibilities to triazoles varied, with MICs of 0.12 to >16 μg/mL among different species of non-Aspergillus molds. The correlation between the CLSI method and Sensititre YeastOne on antifungal susceptibility testing of non-Aspergillus molds was good, with essential agreement (EA) rates of >90% for triazoles and echinocandins except amphotericin B, which had a lower EA rate of 84.6%. In conclusion, a favorable performance of the Bruker MALDI-TOF MS in identification of clinical non-Aspergillus isolates directly inoculated on solid agar media could be achieved with the adoption of alternative interpretation criteria. Antifungal susceptibility testing is important for non-Aspergillus molds, especially when information on triazole susceptibility is required, and the Sensititre YeastOne is a practical and reliable method to determine antifungal susceptibilities of non-Aspergillus molds.