TABLE 5

Summary of outcomes of discordant organism result investigations

Result and analyteNo. of resultsNo. of investigationsa
Comparator result confirmedFilmArray result confirmedBoth results incorrectbInconclusive
BCID FP results
    Enterococcus413
    Staphylococcus12111
    S. aureus4013
    Streptococcus5113
    S. pneumoniae211
    S. pyogenes11
    A. baumannii55
    Enterobacteriaceae413
    E. cloacae complex312
    E. coli5122
    K. pneumoniae9432
    K. oxytoca11
    S. marcescens11
    P. aeruginosa11
    C. albicans44
    C. glabrata22
    C. parapsilosis22
    Total651218530
    % of total FP results1828846
BCID FN results
    Enterococcus33
    Staphylococcus282017
    S. aureus4121
    Streptococcus532
    S. pneumoniae11
    Enterobacteriaceae8431
    E. cloacae complex11
    E. coli33
    K. pneumoniae3111
    K. oxytoca514
    S. marcescens11
    P. aeruginosa11
    C. parapsilosis22
    Total653418112
    % of total FN results5228218
  • a The method used was investigation of possible sample mix-ups, reculturing from frozen aliquots of the blood culture bottle fluid, sequencing directly from the bottle if isolated organisms were expected, or sequencing from resubcultured isolated organisms if more than one isolate per bottle was present. For bacterial resolution, 16S rRNA gene sequences were analyzed and for yeast, ITS1 was analyzed. See Materials and Methods for further information. Three apparent blood culture bottle mix-ups and one apparent bottle selection error were resolved in favor of BCID.

  • b See Results for further information regarding the indicated organism.