“…Other authors [18] described the germicidal properties of propolis and its phenolic components, like caffeic acid, ferulic acid, isoferulic acid, 3,4-dimethoxycinnamic acid, pinobanksin, caffeic acid benzyl ester, and caffeic acid phenethyl ester, which present antimicrobial properties and inhibitory effect on different bacteria such as E. coli, Lactobacillus plantarum, S. aureus, S. epidermidis, Pseudomonas aeruginosa, P. fluorescens, Listeria monocytogenes, L. innocua, Klebsiella pneumoniae, Salmonella typhimurium, S. enteritidis, Streptococcus agalactiae, S. mutans, Bacillus cereus, B. subtilis, Citrobacter freundii, Enterobacter aerogenes, Shigella dysenteriae, Yersinia enterocolitica, and Pantoea agglomerans.…”