Rhizobium radiobacter pseudo-outbreak linked to tissue-processing contamination

Area of Science:

• Microbiology
• Infectious Disease
• Clinical Laboratory Science

Background:

• A cluster of Rhizobium radiobacter isolates from surgical tissue cultures suggested a potential outbreak.
• Investigating the source was critical to ensure patient safety and appropriate clinical management.

Purpose of the Study:

• To identify the source of Rhizobium radiobacter contamination in surgical tissue cultures.
• To implement interventions to prevent future occurrences and unnecessary antibiotic administration.

Main Methods:

• Isolates from six surgical tissue cultures were analyzed.
• Laboratory procedures, including tissue processing and saline sterility, were reviewed.
• Root cause analysis was performed to identify the source of contamination.

Main Results:

• The investigation identified a pseudo-outbreak linked to contaminated, nonsterile saline.
• The contamination originated from errant laboratory tissue processing.
• System-level interventions were implemented following the findings.

Conclusions:

• Contaminated nonsterile saline was the source of the Rhizobium radiobacter pseudo-outbreak.
• Multidisciplinary collaboration and timely response were crucial for resolution.
• Effective interventions avoided unnecessary antibiotic exposures for patients.