Ann Clin Microbiol 2020;23:135-148. Evaluation of the Performance of ASTA MicroIDSys, a Novel Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry System, in Identification of Bacterial Clinical Isolates

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Table 5. List of bacterial identification differences between ASTA MicroIDSys and Bruker Biotyper
GroupReference identification ASTA MicroIDSys Bruker Biotyper
ResultsID score ResultsID score
EnterobacteralesEnterobacter asburiae Enterobacter cloacae†220 Enterobacter asburiae1.771
Enterobacter asburiae Enterobacter cloacae†172 Enterobacter asburiae2.109
Enterobacter hormaechei Enterobacter cloacae*146 Enterobacter cloacae2.193
Klebsiella (Enterobacter) aerogenes Klebsiella pneumoniae213 Klebsiella variicola2.238
Klebsiella pneumoniae Klebsiella pneumoniae258 Invalid Identification1.663
Klebsiella variicola Klebsiella pneumoniae*223 Klebsiella variicola2.138
Klebsiella variicola Klebsiella pneumoniae*211 Klebsiella pneumoniae1.879
Proteus mirabilis Proteus mirabilis236 Invalid Identification1.270
Raoultella planticola Raoultella ornithinolytica*214 Raoultella ornithinolytica2.331
Glucose non-fermenting bacilliAcinetobacter 14TU (A. colistiniresistens) Acinetobacter junii*188 Acinetobacter parvus*1.895
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)155 Acinetobacter baumannii2.049
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)226 Acinetobacter baumannii1.718
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)198 Acinetobacter baumannii1.985
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)174 Acinetobacter baumannii1.911
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)164 Acinetobacter baumannii2.027
Acinetobacter nosocomialis Acinetobacter baumannii complex (nosocomialis)159 Invalid Identification1.667
Acinetobacter grimontii Acinetobacter junii*253 Acinetobacter junii*2.166
Acinetobacter gyllenbergii Acinetobacter junii*181 Acinetobacter junii*1.851
Acinetobacter johnsonii Invalid Identification– Acinetobacter johnsonii2.265
Acinetobacter oleivorans Acinetobacter baumannii complex (pittii)145 Acinetobacter calcoaceticus*1.833
Acinetobacter seifertii Acinetobacter baumannii complex (pittii) *133 Acinetobacter pittii*1.941
Acinetobacter seifertii Acinetobacter baumannii complex (nosocomialis) *161 Acinetobacter baumannii*1.994
Acinetobacter seifertii Acinetobacter nosocomialis*144 Acinetobacter pittii*1.888
Acinetobacter soli Acinetobacter baylyi*176 Invalid Identification*1.670
Acinetobacter soli Acinetobacter baylyi*195 Acinetobacter baylyi*1.821
Acinetobacter venetianus Acinetobacter haemolyticus*189 Acinetobacter haemolyticus*2.190
Burkholderia cepacia Burkholderia cepacia215 Burkholderia cenocepacia1.880
Burkholderia cenocepacia Burkholderia cepacia184 Burkholderia cenocepacia2.115
Burkholderia cenocepacia Burkholderia ambifaria182 Burkholderia cenocepacia2.106
Burkholderia cepacia Burkholderia cenocepacia201 Burkholderia cepacia2.232
Burkholderia cenocepacia Burkholderia cenocepacia194 Burkholderia cepacia2.169
Burkholderia cepacia Burkholderia cepacia199 Burkholderia seminalis2.102
Chryseobacterium massiliae Invalid Identification*– Chryseobacterium species*1.997
Gram-positive cocciStreptococcus pneumoniae Streptococcus pneumoniae182 Invalid Identification1.670
OthersNeisseria macacae Neisseria macacae184 Neisseria mucosa2.052
Nocardia nova Invalid Identification*– Invalid Identification1.696

The isolates which was not correctly identified at the species level were indicated in bold.
*The protein spectra of the species were not included in the database.
†E. asburiae were reported as E. cloacae complex by ASTA MicroIDSys.
Abbreviation: ID, identification.