Clinical and microbiological characteristics of Rhizobium radiobacter infections. Clin. Infect. Dis

zobium radiobacter infections were analyzed. Ten patients (76%) had underlying hematological malignancy or solid-organ cancer. Six patients (46%) had febrile neutropenia dur-ing the course of R. radiobacter infection. The majority (54%) of infections were catheter-related bacteremia, and 92 % of infections were hospital acquired. All the patients survived. Eighteen isolates were recovered from the 13 patients, and each isolate was susceptible to cefepime, piperacillin-tazo-bactam, carbapenems, and ciprofloxacin. The pulsed-field gel electrophoresis profiles differed among the isolates recovered from different patients, indicating the absence of nosocomial spread of the organism. Strains of the Rhizobium species (formerly Agrobacterium, which was reclassified based on 16S rDNA analyses) are aerobic, motile, oxidase-positive, and non–spore-forming gram-nega