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Table 1 List of the microorganisms identified by routine method and direct in house method

From: Rapid direct identification of positive paediatric blood cultures by MALDI-TOF MS technology and its clinical impact in the paediatric hospital setting

List of microorganisms identified by routine methods/number of isolatesNumber of isolates identified by MALDI-TOF MS at the species levelNumber of isolates identified by MALDI-TOF MS at the genus level onlyIsolates not identified by MALDI-TOF MSIsolates with discordant resultsSensitivity (%)Specificity (%)PPV (%)NPV (%)
Staphylococcus aureus (36)36 100100100100
Staphylococcus epidermidis (46)451 82.197.993.394.2
Staphylococcus hominis (9)81 
Staphylococcus haemolyticus (2)2 
Staphylococcus capitis (3)21 
Staphylococcus cohnii (1)1 
Staphylococcus simulans (2)2 
Kocuria kristinae (1)1 
Dolosigranulum pigrum (1)1 
Rothia mucilaginosa (2)2 
Micrococcus luteus (16)79L. monocytogenes (2)
L. adecarboxylata (2)
P. baroniae (1)
Micrococcus terreus (1)1 
Total GPC resembling Staphylococcus (120)105114 88.397.595.593.2
Streptococcus agalactiae (7)61     
Streptococcus pneumoniae (6)51 
Streptococcus mitis/oralis group (9)54 
Streptococcus parasanguinis (2)2 
Streptococcus sanguinis (1)1 
Streptococcus intermedius (1)1 
Other Viridans group of Streptococci (6)24 
Streptococcus constellatus (1)1 
Granulicatella adiacens (1)1 
Abiotrophia defective (2)1L. adecarboxylata (1)
Enterococcus faecalis (23)23 100100100100
Enterococcus faecium (2)2 
Total GPC resembling Streptococcus (61)47212 80.399.69895.5
Clostridium perfringen (2)2     
Clostridium septicum (1)1 
Bacillus cereus (5)41 
Bacillus megaterium (1)1 
Bacillus altitudinis/pumilus (1)1 
Brevibacterium luteolum (1)1 
Bacillus simplex (1)1 
Bacillus gibsonii (1)1 
Dermabacter hominis (1)1 
Actinomyces viscosus (1)1 
Curtobacterium flaccumfaciens (1)1 
Dietzia cinnamea (1)1S. cornosus (1)
Corynebacterium aurimucosum (1)1 
Corynebacterium spp. (2)2 
Total Gram positive rods (20)1217 6599.792.997.7
Escherichia coli (29)29     
Klebsiella pneumoniae (11)11 
Klebsiella oxytoca (2)2 
Enterobacter cloacae complex (22)211 
Salmonella enterica subsp. enterica (14)14 
Serratia marcescens (4)4 
Morganella morganii (1)1 
Pseudomonas aeruginosa (9)9 
Acinetobacter radioresistans (1)1 
Acinetobacter lwoffii (1)1 
Acinetobacter ursingii (1)1 
Acinetobacter baumannii (1)1 
Acinetobacter johnsonii (1)1 
Stenotrophomonas maltophilia (7)7 
Neisseria meningitides (1)1 
Moraxella catarrhalis (2)2 
Total Gram negatives (107)1061 9910010099.5
Candida albicans (1)1     
Candida parapsilosis (9)9 
Total yeast (10)10     
  1. MALDI-TOF matrix assisted laser desorption ionization-time of flight, PPV positive predictive value, NPV negative predictive value