Bioactive Packaging Materials from Edible Chitosan Polymer—Antimicrobial Activity Assessment on Dairy‐Related Contaminants

摘要: ABSTRACT The inhibitory activity of chitosan-based edible coatings was assessed against 2 food pathogens (Staphylococcus aureus and Listeria monocytogenes) 1 strain involved in alteration (Pseudomonas aeruginosa) on model agar medium a real cheese product. Colony counting epifluorescence microscopy methods were conducted, the results show nonsignificant influence components matrix protection microbial population chitosan activity. Numeration showed 100% inhibition development selected Gram-positive bacteria 77% Pseudomonas growth. Chitosan is thought to act through binding cytoplasmic membrane surface, it possible that outer protects Gram-negative cells. Moreover, microscopic action during short time duration synthesis nucleic acids especially relative proportion RNA compared with DNA. This impact followed by an adaptative mechanism Edible coating could thus be used increase lag phase while decreasing maximum density microorganisms have potential application for dairy products preservation.