Effective terminal sterilization using supercritical carbon dioxide.

Area of Science:

• Biomedical Engineering
• Microbiology
• Chemical Engineering

Background:

• Advances in biomedical technologies necessitate gentle sterilization alternatives.
• Supercritical fluid technologies, particularly supercritical CO(2), show promise for medical contaminant inactivation.
• Current supercritical CO(2) methods face challenges in rapidly inactivating bacterial endospores for terminal sterilization.

Purpose of the Study:

• To develop a supercritical CO(2) based sterilization process for rapid and gentle inactivation of bacterial endospores.
• To assess the suitability of this process for terminal sterilization of sensitive biomedical products.

Main Methods:

• Development of a novel supercritical CO(2) sterilization process.
• Evaluation of the process's efficacy in inactivating bacterial endospores within terminal packaging.
• Analysis of microbial morphology, ultrastructure, and protein profiles post-sterilization.

Main Results:

• The developed supercritical CO(2) process achieved rapid inactivation of bacterial endospores in terminal packaging.
• The sterilization method was found to be gentle, preserving the morphology, ultrastructure, and protein profiles of the inactivated microbes.
• The process demonstrated effectiveness without compromising the integrity of sensitive materials.

Conclusions:

• A gentle and effective supercritical CO(2) sterilization process has been developed for bacterial endospore inactivation.
• This technology is suitable for terminal sterilization of a wide range of sensitive biomedical products, including tissue-derived materials and protein-based therapies.