Table 1.
BC-GP assay target | No. of isolates detected by: |
% agreement | |
---|---|---|---|
BC-GP assaya | Conventional identificationb | ||
Staphylococcus spp.c | 78 | 81 | 96 |
S. aureus | 36 | 38 | 95 |
S. epidermidis | 25 | 26 | 96 |
Enterococcus faecalis | 2 | 3 | 67 |
Enterococcus faecium | 15 | 16 | 94 |
Streptococcus spp.d | 29 | 30 | 97 |
S. agalactiae | 9 | 9 | 100 |
S. anginosus group | 1 | 1 | 100 |
S. pneumoniae | 6 | 6 | 100 |
Nontarget organismse | 26 | 26 | 100 |
Overall target agreementf | 96 |
Includes isolates that were positive on repeat testing after failures in initial testing.
Samples with more than one organism corresponding to the same target were counted once per target. Reasons for discrepancies in the numbers between the BC-GP assay results and conventional identification included polymicrobial samples, one repeat test failure, and one failure of the BC-GP assay to detect the target.
BC-GP assay target includes S. aureus and S. epidermidis.
BC-GP assay target includes S. agalactiae, S. pneumoniae, S. pyogenes, and S. anginosus group.
Blood sample organisms that were not intended targets of the BC-GP assay included Aerococcus viridans (n = 2), Bacillus spp. (n = 6), Corynebacterium spp. (n = 8), Escherichia coli (n = 2), Lactobacillus spp. (n = 2), Micrococcus spp. (n = 2), Neisseria spp. (n = 1), Propionibacterium spp. (n = 1), Rothia spp. (n = 1), and C. tropicalis (n = 1).
Overall target agreement is the percentage of targets which correlated with organism identification. Resistance markers were not included in this calculation.