Table 2. Routine identification results and corresponding FA-BCID results for all strains cultured from the positive blood culture bottles included in the intervention period.
| MALDI-TOF MS ID results (n) | FA-BCID results (n) | |||
|---|---|---|---|---|
| species ID | genus ID | no organism detected | ||
| TOTAL microorganisms | 149 | 81 | 46 | 22 |
| Gram-positive bacteria | 75 | 23 | 41 | 11 |
| Staphylococci | ||||
| Staphylococcus aureus | 14 | 14 | NA | 0 |
| Staphylococcus capitis | 2 | NA | 1 | 1 |
| Staphylococcus epidermidis | 24 | NA | 24 | 0 |
| Staphylococcus haemolyticus | 4 | NA | 4 | 0 |
| Staphylococcus hominis | 2 | NA | 1 | 1 |
| Enterococci | ||||
| Enterococcus avium | 1 | NA | 0 | 1 |
| Enterococcus casseliflavus | 1 | NA | 0 | 1 |
| Enterococcus faecalis | 6 | NA | 6 | 0 |
| Enterococcus faecium | 1 | NA | 1 | 0 |
| Streptococci | ||||
| Pyogenic group | ||||
| Streptococcus pyogenes | 2 | 2 | NA | 0 |
| Streptococcus dysgalactiae | 1 | NA | 1 | 0 |
| Viridans group | ||||
| Streptococcus anginosus group | 2 | NA | 2 | 0 |
| Streptococcus pneumoniae | 6 | 6 | NA | 0 |
| Streptococcus salivarius group | 1 | NA | 1 | 0 |
| Other Streptococci | ||||
| Abiotrophia defectiva | 1 | NA | NA | 1 |
| Other Gram-positive organisms | ||||
| Bacillus cereus | 2 | NA | NA | 2 |
| Facklamia hominis | 1 | NA | NA | 1 |
| Gemella morbillorum | 1 | NA | NA | 1 |
| Lactobacillus rhamnosus | 1 | NA | NA | 1 |
| Listeria monocytogenes | 1 | 1 | NA | 0 |
| Propionibacterium acnes | 1 | NA | NA | 1 |
| Gram-negative bacteria | 63 | 55 | 5 | 3 |
| Enterobacteriaceae | ||||
| Citrobacter freundii | 1 | NA | 1a | 0 |
| Citrobacter koseri | 1 | NA | 1a | 0 |
| Enterobacter aerogenes | 1 | NA | 1a | 0 |
| Enterobacter cloacae complex | 2 | 2 | NA | 0 |
| Escherichia coli | 38 | 35 | 2b | 1 |
| Klebsiella oxytoca | 2 | 2 | NA | 0 |
| Klebsiella pneumoniae | 5 | 5 | NA | 0 |
| Serratia marcescens | 2 | 2 | NA | 0 |
| Non-fermenters | ||||
| Acinetobacter baumannii | 2 | 2 | NA | 0 |
| Pseudomonas aeruginosa | 6 | 6 | NA | 0 |
| Stenotrophomonas maltophilia | 1 | NA | NA | 1 |
| Other Gram-negative organisms | ||||
| Haemophilus influenzae | 1 | 1 | NA | 0 |
| Moraxella nonliquefaciens | 1 | NA | NA | 1 |
| Anaerobes | 8 | NA | NA | 8 |
| Bacteroides fragilis | 1 | NA | NA | 1 |
| Bacteroides ovatus | 1 | NA | NA | 1 |
| Clostridium celerecrescens | 1 | NA | NA | 1 |
| Clostridium perfringens | 1 | NA | NA | 1 |
| Clostridium tertium | 1 | NA | NA | 1 |
| Finegoldia magna | 1 | NA | NA | 1 |
| Parabacteroides distasonis | 1 | NA | NA | 1 |
| Parvimonas micra | 1 | NA | NA | 1 |
| Yeasts | 3 | 3 | NA | 0 |
| Candida albicans | 1 | 1 | NA | 0 |
| Candida glabrata | 2 | 2 | NA | 0 |
a: Identified to the group level Enterobacteriaceae according to the panel’s abilities;
b: Identified to the group level Enterobacteriaceae despite the presence of the species Escherichia coli in the panel.
Microorganisms in bold are strains absent from the FA-BCID panel.
Abbreviations: FA-BCID, FilmArray blood culture identification; ID, identification; MALDI-TOF MS, matrix-assisted laser desorption ionization time-of-flight mass spectrometry; NA, not applicable.