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Generation of Alginate Microspheres for Biomedical Applications
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Advancing Duodenoscope Reprocessing with Alginate-Coated Calcium Peroxide Nanoparticles.

Adrian Fifere1, Cristian-Dragos Varganici1, Elena-Laura Ursu1

  • 1Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania.

Life (Basel, Switzerland)
|November 27, 2025
PubMed
Summary

Calcium peroxide nanoparticles coated with sodium alginate (CaO2-Alg NPs) effectively disinfect duodenoscopes, combating pathogens without damaging device polymers. This offers a promising solution for safer reprocessing and reduced nosocomial infections.

Keywords:
alginateantibacterialcalcium peroxide nanoparticlesdisinfectantduodenoscope reprocessing

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Area of Science:

  • Biomaterials Science
  • Infectious Disease Control
  • Medical Device Reprocessing

Background:

  • Duodenoscope reprocessing faces challenges with residual contamination and device degradation.
  • Existing methods struggle to eliminate infection risks and prevent polymer damage.
  • Novel disinfectants are needed to maintain duodenoscope integrity and patient safety.

Purpose of the Study:

  • To evaluate calcium peroxide nanoparticles coated with sodium alginate (CaO2-Alg NPs) as a novel duodenoscope disinfectant.
  • To assess the antimicrobial efficacy of CaO2-Alg NPs against nosocomial pathogens.
  • To determine the material compatibility of CaO2-Alg NPs with duodenoscope polymers.

Main Methods:

  • CaO2-Alg NPs were tested for disinfectant properties against common nosocomial bacteria under biomimetic conditions.
  • Nanoparticle compatibility with duodenoscope polymers was assessed after simulated intensive use.
  • Material characterization included FTIR, DSC, AFM, and SEM analysis.

Main Results:

  • CaO2-Alg NPs demonstrated significant antimicrobial activity against Staphylococcus aureus, Escherichia coli, Enterococcus faecalis, and Klebsiella pneumoniae within 20 minutes.
  • Intensive exposure to CaO2-Alg NPs did not induce structural or morphological damage to duodenoscope polymers.
  • Anti-adhesive properties of the polymers remained unaffected by the nanoparticle treatment.

Conclusions:

  • CaO2-Alg NPs show potential as a safe and effective disinfectant for duodenoscope reprocessing.
  • The nanoparticles offer both potent antimicrobial action and excellent material compatibility.
  • This innovation could enhance patient safety by reducing infection transmission risks.