Repurposing Success: Real-World Validation of a Novel Cephalosporin Decontamination Protocol Using Chlorine Dioxide...

Area of Science:

• Pharmaceutical Manufacturing
• Chemical Decontamination
• Regulatory Compliance

Background:

• Beta-lactam manufacturing facilities face significant regulatory hurdles when repurposing for non-beta-lactam production due to cross-contamination risks.
• Effective decontamination protocols are crucial for ensuring product safety and regulatory adherence.

Purpose of the Study:

• To introduce and validate a novel decontamination protocol for cephalosporin manufacturing facilities.
• To assess the efficacy of chlorine dioxide (ClO2) in degrading and inactivating beta-lactam residues.
• To verify the protocol's success in a real-world manufacturing environment.

Main Methods:

• Antimicrobial susceptibility discs (ASDs) contaminated with cephalosporins were treated with aqueous and gaseous chlorine dioxide (ClO2).
• Degradation was quantified using liquid chromatography-tandem mass spectrometry (LC-MS/MS).
• Biological inactivation was assessed through microbial challenge testing.

Main Results:

• LC-MS/MS confirmed cephalosporin degradation below the reporting limit (<0.02 μg/disc) for all tested compounds.
• Microbial challenge testing showed no significant biological activity, with bacterial inhibition <1 mm.
• Aqueous and gaseous ClO2 treatments demonstrated high agreement (Cohen's κ = 1.00) in confirming decontamination.

Conclusions:

• The study presents the first successful protocol for cephalosporin facility decontamination using gaseous ClO2 in a real-world setting.
• The developed protocol effectively degrades and inactivates beta-lactam residues, meeting regulatory requirements for facility repurposing.