Abstract
Arthrobacter spp., which are coryneform gram-positive bacilli, are widely distributed in the environment, including soil. In humans, infection with Arthrobacter is recognized as an opportunistic infection. In particular, since the first reported case in 1996, human infection by A. woluwensis has been reported only four times. We report on a case of A. woluwensis bacteremia in a 76-year-old female patient with multiple myeloma. Performance of 16S rRNA gene sequence analyses resulted in identification of A. woluwensis. The patient was treated with teicoplanin, and the central venous port was removed. Since then, no growth has been observed on repeated blood cultures. The patient was discharged well after the fever subsided.
Figures and Tables
![]() | Figure 3Gram positive bacilli isolated from blood formed white bacterial colonies on blood agar medium at 35℃ in ambient air on the 30th hospital day. |
Table 1
Clinical Characteristics of Five Patients with Arthrobacter woluwensis Bacteremia Reported to Date

Table 2
In vitro Antibiotic Susceptibility Test of Arthrobacter woluwensis Isolated from Bacteremic Patients

AMC, amoxicillin-clavulanic acid; AM, ampicillin; CRO, ceftriaxone; CXM, cefuroxime; CTX, cefotaxime; CE, cephalothin; C, chloramphenicol; CIP, ciprofloxacin; CLI, clindamycin; ERY, erythromycin; GM, gentamicin; OXA, oxacillin; IPM, imipenem; PE, penicillin G; RIF, rifampin; SXT, trimethoprim/sulfamethoxazole; TET, tetracycline; TEC, teicoplanin; VA, vancomycin; LIN, linezolid; MIC, minimal inhibitory concentration; S, susceptible; I, intermediate; R, resistant
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