“…Strong in vitro evidence indicates that essential oils can act as antibacterial agents against a wide spectrum of pathogenic bacterial strains including Listeria monocytogenes, L. innocua, Salmonella typhimurium, Escherichia coli O157:H7, Shigella dysenteria, Bacillus cereus, Staphylococcus aureus and Salmonella typhimurium (Schmidt et al, 2005;Jirovetz et al 2005;Burt, 2004;Dadalioglu and Evrendilek, 2004;Nguefack et al, 2004;Hulin et al, 1998) and many more (Deans and Ritchie, 1987). Thyme and oregano essential oils can inhibit some pathogenic bacterial strains such as E. coli, Salmonella enteritidis, Salmonella choleraesuis and Salmonella typhimurium (Penalver et al, 2005), with the inhibition directly correlated to the phenolic components carvacrol and thymol.…”