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. 2014 May;6(5):545–552. doi: 10.3978/j.issn.2072-1439.2014.02.21

Table 1. The comparison of identification results of bacterial isolates using Vitek MS and automated microbiology system.

No. of isolates NO. of isolates with the indicated results using automated microbiology system
NO. of isolates with the indicated results using MALDI-TOF MS
Identification to the level of species Identification to the level of genus Identification to the level of species Identification to the level of genus
Enterobacteriaceae 270 258 264 243 265
   Escherichia coli 154 153 153 154 154
   Klebsiella Pneumoniae 52 51 51 52 52
   Enterobacter cloacae 16 15 16 0 16
   Proteus mirabilis 9 9 9 9 9
   Enterobacter aerogenes 6 6 6 4 6
   Morganella morganii 7 7 7 7 7
   Klebsiella oxytoca 2 2 2 2 2
   Serratia marcescens 11 9 9 11 11
   Serratia rubidaea 1 1 1 1 1
   Citrobacter koseri 1 0 0 1 1
   Citrobacter freundii 1 0 1 1 1
   Enterobacter gergoviae 1 1 1 1 1
   Shigella 5 2 5 0 0
   Salmonella 4 2 3 0 4
Nonfermentative Bacilli 134 127 130 129 132
   Acinetobacter baumannii 58 58 58 58 58
   Pseudomonas aeruginosa 51 49 50 51 51
   Stenotrophomonas maltophilia 6 5 5 6 6
   Burkholderia cepacia 7 6 6 5 6
   Pseudomonas alcaligenes 2 2 2 2 2
   Acinetobacter junii 2 0 2 2 2
   Elizabethkingia meningoseptica 2 2 2 2 2
   Achromobacter xylosoxidans 2 2 2 0 2
   Sphingomonas paucimobilis 1 1 1 1 1
   Burkholderia multivorans 1 0 0 1 1
   Chromobacterium indologenes 1 1 1 1 1
   Ochrobactrum anthropi 1 1 1 0 0
Staphylococcus 298 244 295 293 296
   Staphylococcus aureus 81 79 81 81 81
   Staphylococcus epidermidis 101 71 98 97 99
   Staphylococcus hominis 27 15 27 26 27
   Staphylococcus haemolyticus 38 35 38 38 38
   Staphylococcus capitis 30 29 30 30 30
   Staphylococcus warneri 9 7 9 9 9
   Staphylococcus caprae 3 3 3 3 3
   Staphylococcus sciuri 3 3 3 3 3
   Staphylococcus cohnii 5 2 5 5 5
   Staphylococcus lugdunensis 1 0 1 1 1
Enterococcus 92 66 91 92 92
   Enterococcus faecalis 60 52 60 60 60
   Enterococcus faecium 31 14 31 31 31
   Enterococcus casselifavus 1 0 0 1 1
Streptococcus 70 48 68 62 69
   Streptococcus agalactiae 6 6 6 6 6
   Streptococcus anginosus 15 10 15 14 15
   Streptococcus intermadius 2 1 2 2 2
   Streptococcus constellatus 5 4 5 4 5
   Streptococcus dysgalactiae 21 10 20 17 21
   Streptococcus pyogenes 10 8 10 9 10
   Streptococcus pneumoniae 11 9 10 10 10
Other bacterium 12 3 5 11 12
   Aerococcus viridans 1 0 0 1 1
   Micrococcus luteus 1 0 0 1 1
   Corynebacterium aurimucosum 1 0 0 1 1
   Microbacterium aurum 1 0 0 0 1
   Corynebacterium jeikeium 5 3 4 5 5
   Listeria monocytogenes 3 0 1 3 3
Total (%) 876 746 (85.2) 853 (97.3) 830 (94.7) 866 (98.9)