Catheter-Related Bloodstream Infection with Rhizobium radiobacter and Pseudomonas oryzihabitans Co-Infection: A Case Report and Literature Review

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Abstract
Background: Catheter-related bloodstream infections (CRBSIs) caused by environmental organisms are uncommon, and polymicrobial cases are even rarer. Methods: We describe the first case of catheter-related bloodstream infection caused by two infrequent environmental organisms—Rhizobium radiobacter and Pseudomonas oryzihabitans—occurring as a co-infection. Results: The patient’s occupation involved frequent exposure to moist, soil-contaminated environments. Although these bacteria are often considered contaminants, they are capable of causing invasive infections such as bacteremia, which can be life-threatening. Conclusions: This case underscores the emerging pathogenic potential of R. radiobacter and P. oryzihabitans co-infection, particularly in patients with underlying malignancies or end-stage renal disease who have indwelling vascular devices, and highlights the importance of considering occupational and environmental exposures in the differential diagnosis of unusual pathogens.
Funding Information
  • Taichung Veterans General Hospital (TCVGH-1155101C)
  • Taichung Veterans General Hospital (TCVGH-1155101D)
  • National Science and Technology Council (NSTC 114-2314-B-075A-010)

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