Abstract
The biological activity of postbiotic from Bacillus subtilis exometabolites was determined due to protein content - 0.541±13.4 mg/ml, the level of proteases - 7.8±0.3 U/ml and the presence of antimicrobial substances. A biocomposite material was developed by co-aggregation of bacterial cellulose, chitosan and Bacillus exometabolites. Modified BC gel film possesses high antagonistic activity against causative agents of wound infections: Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis. The use of the obtained material in treatment of wounds on laboratory animals reduces healing time by an average of 20%. The developed bioactive wound dressings is intended for local application in order to optimize the wound healing process.