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Table. 2.

Table. 2.

Results of identification and antimicrobial susceptibility testing with the modified protocol using BACTEC Plus and BacT/Alert bottles

Microorganisms N correct identifications/N total isolates (%) Antimicrobial susceptibility test
BACTEC Plus bottles BacT/Alert bottles N categorical agreement Total N antibiotics showing discrepancy
BACTEC Plus bottles BacT/Alert bottles Very major error Major error Minor error
Gram-positive 58/63 (92.1%) 14/15 (93.3%) 679/704 (96.4%) 215/221 (97.3%) 9 4 18
Staphylococcus aureus 9/9 5/6 175/181 120/121 Azithromycin (1) Azithromycin (1)
Quinupristin/dalfopristin (1)
Trimethoprim/sulfamethoxazole (1)
Erythromycin (1)
Gentamicin (1)
Tobramycin (1)
Staphylococcus epidermidis 11/12 - 193/204 - Trimethoprim/sulfamethoxazole (3)
Clindamycin (1)
Telithromycin (1) Gentamicin (2)
Teicoplanin (2)
Ciprofloxacin (1)
Clindamycin (1)
Staphylococcus haemolyticus 3/3 1/1 47/51 17/17 Clindamycin (1) Erythromycin (2)
Nitrofurantoin (1)
Staphylococcus capitis 1/1 1/1 17/17 16/17 Gentamicin (1)
Staphylococcus hominis 1/1 - 17/17 -
Streptococcus gordonii 1/1 - 13/13 -
Streptococcus mitis/oralis 4/4 - 13/13 -
Streptococcus parasanguinis 0/1 - 12/12 -
Enterococcus faecium 11/12 5/5 127/130 53/55 Vancomycin (2)
Teicoplanin (1)
Erythromycin (2)
Teicoplanin (2)
Enterococcus faecalis 5/5 1/1 54/55 11/11 Linezolid (1)
Enterococcus gallinarum 1/1 - 11/11 -
Kocuria rhizophila - 1/1 - -
Atopobium rimae 0/1 - - -
Bacillus spp. 5/5 - - -
Bifidobacterium longum 1/1 - - -
Clostridium tertium 1/1 - - -
Corynebacterium striatum 2/2 - - -
Granulicatella adiacens 1/1 - - -
Lactobacillus gasseri 1/1 - - -
Phycicoccus dokdonensis 1/1 - - -
Gram-negative 49/50 (98.0%) 24/25 (96.0%) 740/750 (98.7%) 415/424 (97.9%) 2 2 15
Escherichia coli 25/25 18/19 422/425 322/327 Ampicillin/sulbactam (2)
Cefepime (5)
Ciprofloxacin (1)
Klebsiella aerogenes 1/1 - 17/17 -
Klebsiella pneumoniae 6/6 3/3 101/102 50/50 Gentamicin (1)
Trimethoprim/sulfamethoxazole (1)
Cefepime (1)
Cefoxitine (1)
Klebsiella oxytoca 1/1 - 17/17 -
Enterobacter cloacae 4/4 - 68/68 -
Proteus mirabilis - 2/2 - 30/30
Serratia marcescens 1/2 - 33/34 - Tigecycline (1)
Morganella morganii 1/1 - 17/17 -
Aeromonas hydrophila 1/1 - 12/12 -
Achromobacter xylosoxidans 1/1 - 11/14 - Tigecycline (1) Amikacin (1)
Cefepime (1)
Acinetobacter baumannii - 1/1 - 13/14 Amikacin (1)
Pseudomonas aeruginosa 4/4 - 42/44 - Aztreonam (1)
Piperacillin/tazobactam (1)
Bacteroides spp. 4/4 - -
Total 107/113 (94.7%) 38/40 (95.0%) 1419/1454 (97.6%) 630/645 (97.7%) 11 6 33
Ann Lab Med 2024;44:183~187 https://doi.org/10.3343/alm.2023.0294

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