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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 14, Issue:9, September, 2025

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com /
submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2025.14(9): 113-116
DOI: https://doi.org/10.20546/ijcmas.2025.1409.012


An Unforeseen Offender: Rhizobium radiobacter Bacteremia in Catheterized Patients
Archana Murali1Jayagandan Sangitha1Hyma Kooleri Padinjare Veetil1*, A. Benedict Vinothini1, Divya Patale2, Sreejith Parameswaran2 and Apurba Sankar Sastry1
1Department of Microbiology, 2Department of Nephrology, JIPMER, Puducherry, India
*Corresponding author
Abstract:

Catheter-related bloodstream infections (CRBSIs) are a major cause of morbidity in patients with chronic kidney disease (CKD) undergoing maintenance hemodialysis. We report the case of a 19-year-old female with bilateral grade IV CKD and end-stage renal disease (ESRD) on hemodialysis via a right internal jugular vein (IJV) catheter, who presented with fever, nausea, and vomiting. Blood cultures obtained from the central line and peripheral vein flagged positive with a 2.5-hour differential time to positivity. Gram staining and culture revealed Gram-negative bacilli, later identified by MALDI-TOF MS as Rhizobium radiobacter, an emerging opportunistic pathogen. Antimicrobial susceptibility testing demonstrated susceptibility to cotrimoxazole, fluoroquinolones, cefepime, meropenem, and minocycline, but resistance to ceftazidime and amikacin. The patient was treated with cefoperazone-sulbactam and catheter removal, following which repeat blood cultures were sterile. R. radiobacter, once considered a contaminant, is increasingly recognized as a true pathogen in immunocompromised hosts with indwelling intravascular devices due to its ability to adhere to silicone surfaces. This case highlights the importance of considering R. radiobacter as a potential cause of CRBSI in hemodialysis patients and emphasizes prompt diagnosis, appropriate antibiotic therapy, and catheter removal as critical components of management.


Keywords: Rhizobium, genus, catheter-related bacteremia


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How to cite this article:

Archana Murali, Jayagandan Sangitha, Hyma Kooleri Padinjare Veetil, A. Benedict Vinothini, Divya Patale, Sreejith Parameswaran and Apurba Sankar Sastry. 2025. An Unforeseen Offender: Rhizobium radiobacter Bacteremia in Catheterized Patients.Int.J.Curr.Microbiol.App.Sci. 14(9): 113-116. doi: https://doi.org/10.20546/ijcmas.2025.1409.012
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.

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