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Table 1 Direct MALDI-TOF results from 199 blood culture bottles by lysis method and cut off value used

From: Evaluation of three sample preparation methods for the direct identification of bacteria in positive blood cultures by MALDI-TOF

Species identified Number of identifications of each species made by direct MALDI-TOF from a single blood culture bottle using:
Cut off value ≥ 1.700 Cut off value ≥ 2.000
Saponin SDS Sepsi-Typer Saponin SDS Sepsi-Typer
Gram positives
 Actinomyces oris 1 1 1 0 0 0
 Clostridium innocuum 1 0 0 0 0 0
 Corynebacterium amycolatum 1 1 1 0 1 0
 Corynebacterium mucifaciens 0 1 0 0 0 0
 Corynebacterium tuberculostearicum 0 0 1 0 0 0
 Enterobacter cloacae 3 3 3 2 3 3
 Enterococcus faecalis 4 4 4 0 2 3
 Enterococcus faecium 2 7 7 1 7 7
 Granulicatella adiacens 0 1 1 0 1 1
 Kocuria rhizophila 0 1 1 0 0 0
 Micrococcus luteus 2 3 3 1 2 2
 Propionibacterium acnes 0 2 3 0 1 2
 Staphylococcus aureus 18 17 17 12 16 17
 Staphylococcus capitis 13 11 13 8 7 6
 Staphylococcus cohnii 0 1 1 0 1 1
 Staphylococcus epidermidis 23 19 17 11 8 7
 Staphylococcus haemolyticus 2 2 2 0 1 2
 Staphylococcus hominis 11 10 11 8 10 10
 Streptococcus agalactiae 1 1 1 0 1 1
 Streptococcus anginosus 1 0 0 0 0 0
 Streptococcus constellatus 1 1 2 0 0 0
 Streptococcus dysgalactiae 0 1 1 0 0 0
 Streptococcus intermedius 0 1 1 0 0 0
 Streptococcus lutetiensis 0 1 1 0 0 0
 Streptococcus mutans 0 2 1 0 1 1
 Streptococcus parasanguinis 0 1 1 0 0 1
 Streptococcus pneumoniae 0 1 1 0 1 1
 Streptococcus pyogenes 0 3 3 0 2 3
 Streptococcus sanguinis 1 4 4 0 2 3
Gram negatives
 Bacteroides fragilis 2 0 0 2 0 0
 Escherichia coli 32 35 36 28 34 36
 Klebsiella oxytoca 3 3 3 3 3 3
 Klebsiella pneumoniae 5 5 5 4 5 5
 Moraxella catarrhalis 1 1 1 0 1 1
 Morganella morganii 2 2 2 2 2 2
 Proteus mirabilis 4 4 4 3 3 4
 Pseudomonas aeruginosa 3 2 3 3 2 2
 Serratia marcescens 3 2 3 1 2 3
 Serratia ureilytica 0 1 0 0 1 0
No identification 59 44 40 110 79 72
Total 199 199 199 199 199 199
  1. Cut off value ≥1.700 = ≥1.700 and top three results matching