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Assessing Biofilm Dispersal in Murine Wounds
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Robust rapid-setting antibacterial liquid bandages.

Carlos A P Bastos1, William D Thom2, Beth Reilly2

  • 1Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 0ES, UK. capb2@cam.ac.uk.

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This study introduces a novel shellac-based bandage enhanced with zinc and copper. This innovative wound dressing offers superior barrier properties and infection control for challenging topical applications.

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Area of Science:

  • Materials Science
  • Veterinary Medicine
  • Biotechnology

Background:

  • Traditional bandaging is labor-intensive and infection risk is a significant concern.
  • Current rapid-set liquid bandages lack durability and infection control.
  • Shellac, a natural polymer, offers waterproof and bio-adhesive properties.

Purpose of the Study:

  • To enhance the barrier and antibacterial properties of shellac using zinc (Zn) and copper (Cu) species.
  • To evaluate the efficacy of the Zn/Cu-shellac bandage in an in vivo model of bovine digital dermatitis.

Main Methods:

  • Incorporation of antibacterial Zn and Cu species into shellac to improve barrier function.
  • Ex-vivo studies to assess the ability to lock-in therapeutics.
  • In vivo testing on bovine digital dermatitis, challenging the bandage with polybacterial contamination and fecal slurry.

Main Results:

  • Zn/Cu-shellac demonstrated enhanced barrier properties and marked antibacterial contact activity.
  • The bandage effectively adhered and retained pre-applied antibiotics in vivo.
  • Self-degradation occurred over 7 days under extreme conditions, with observed clinical improvement in animal mobility and good tolerance.

Conclusions:

  • Zn/Cu-shellac represents a new class of bandage with promising antibacterial and barrier functionalities.
  • This advanced wound dressing is suitable for challenging topical applications, particularly in non-sterile environments for both human and animal use.
  • The material provides robust protection against environmental and bacterial contamination.