In-vitro Analysis for Microbial Barrier Properties of 2-Octyl Cyanoacrylate-Derived Wound Treatment Films

Background: In recent years, 2-octyl cyanoacrylate monomer has been formulated for various wound care products that have been approved by the Food and Drug Administration (FDA). Purpose: To evaluate the in vitro effectiveness of 2-octyl cyanoacrylate formulation-based films as barriers to various pathogens, including bacteria, fungi, and yeast. Methods: The barrier properties of the cyanoacrylate films prepared by the following two methods were tested: (1) prepolymerized film and (2) in situ polymerized film. The upper surface of films was inoculated such that the microorganisms would have to penetrate the film to colonize the media beneath. Nine different organisms were used. Plates were observed for growth at two, four, and seven days after inoculation. Results: No growth was observed in any test, with the exception of prepolymerized film challenged with Pseudomonas aeruginosa. The pattern of growth observed suggests that the bacteria colonized the medium by traveling around and not through the film. Conclusions: 2-Octyl cyanoacrylate-based films are excellent microbial barriers.