A Case of Chryseobacterium hominis Isolated from Human Blood Drawn Through Peripherally Inserted Central Catheter
- Author:
Dongju WON
1
;
Jung Hyun BYUN
;
Myungsook KIM
;
Dongeun YONG
Author Information
- Publication Type:Case Report
- Keywords: Chryseobacterium; Chryseobacterium hominis; Catheter-related blood stream infection; Bacteremia
- MeSH: Adolescent; Agar; Bacteremia; Bacteria; Cacao; Catheters; Chryseobacterium; Fever; Follow-Up Studies; Genes, rRNA; Humans; Leukocyte Count; Male; Precursor Cell Lymphoblastic Leukemia-Lymphoma; Prognosis; Sphingomonas
- From:Laboratory Medicine Online 2019;9(4):246-248
- CountryRepublic of Korea
- Language:English
- Abstract: Chryseobacterium hominis is non-fermenting Gram-negative rod that was first identified as a novel species in 2007. Here, we report the first clinical case of C. hominis bacteremia, which was confirmed by MALDI-TOF MS and 16S rRNA gene sequencing. A 16-year-old boy diagnosed with acute lymphoblastic leukemia was hospitalized for three months. Two sets of blood culture test through a peripherally inserted central catheter (PICC), which was inserted a month ago, was performed when his white blood cell count declined and he had a high fever. Colonies of medium sizes that looked round, mucoid, sticky, and grayish on blood and chocolate agar plates were observed. Identification of bacteria using the VITEK MALDI-TOF MS system (BioMérieux, France) was not successful and the VITEK 2 system (BioMérieux, USA) indicated Sphingomonas paucimobilis, with a questionable level of confidence (92%). However, Microflex LT Biotyper (Bruker Daltonics, Germany) showed C. homins (log score: 1.81) and sequence of 16S rRNA showed a 100% identity with C. hominis. Piperacillin-tazobactam was administered since the isolate was susceptible to piperacillin-tazobactam but C. hominis showed growth in the next four follow-up culture of blood drawn through PICC. The fever subsided only after PICC was changed. The clinical prognosis and antimicrobial susceptibility test of C. hominis should be further studied.
