TABLE 2.
Characteristics of six isolates of Desulfovibrio fairfieldensis from cases of bacteremiaa
| Patient | Blood culture system | Time to positivity (days) | Test result
|
Pure culture | Antimicrobial susceptibility test | Antimicrobials
|
Molecular identification test | Reference | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Catalase | Oxidase | Indole | Nitrate | Urease | H2S production | H2S odor | Motile | Susceptible | Resistant | |||||||
| 1 | BacT/ALERT | 6 | + | − | − | − | − | + | Yes | + | Yes | DD, Etest | MTZ, CHL, CIP, IPM, AMC, TIM, ATH, CLI | PEN, AMP, CEF, CEC, TIC, SXT, GEN, CTX, VAN | 16S | 11 |
| 2 | Vital | NR | + | NR | − | − | − | + | NR | + | Yes | Agar dilution | MTZ, IPM, CLI | PEN, AMP, AMC, TIM, TZP, FOX, CTT, CTX | 16S | 9 |
| 3 | NR | NR | + | NR | − | − | − | + | NR | + | No | NR | NR | NR | 16S | 9 |
| 4 | NR | NR | + | NR | − | + | − | + | NR | + | NR | Agar dilution | MTZ, CHL, KAN | CRO, TZP, VAN, COL | 16S | 15 |
| 5 | BacT/ALERT | 4 | + | − | − | + | − | + | Yes | + | Yes | Etest | MTZ, CIP | TIM | 16S | This study |
| 6 | E-vac | 4 | + | − | − | w | − | + | Yes | + | Yes | NR | PEN, CLI, CHL, TET, ERY | NR | NP | 13 |
a
16S, 16S rRNA gene sequence; AMC; amoxicillin-clavulanic acid; AMP, ampicillin; ATH, azithromycin; CEC, cefaclor; CEF, cefalothin; CHL, chloramphenicol; CIP, ciprofloxacin; CLI, clindamycin; COL, colistin; CRO, ceftriaxone; CTT, cefotetan; CTX, cefotaxime; DD, disc diffusion; ERY, erythromycin; FOX, cefoxitin; GEN, gentamicin; IPM, imipenem; KAN, kanamycin; MTZ, metronidazole; NP, not performed; NR, not reported; PEN, penicillin; SXT, trimethoprim-sulfamethoxazole; TET, tetracycline; TIC, ticarcillin; TIM, ticarcillin-clavulanic acid; TZP, piperacillin-tazobactam; VAN, vancomycin.