Interference of Origanum vulgare L. essential oil on the growth and some physiological characteristics of Staphylococcus aureus strains isolated from foods

Effects of metal oxide nanoparticles with plant extract on viability of foodborne pathogens

“…No antibacterial activities were detected in the remaining plant extracts (ginger, thyme, marjoram, bay laurel, black seed, and yellow turmeric) against the tested microorganisms at concentrations up to 12 mg/mL. Other studies reported the MIC for these plant extracts to be lower than those levels used in the current study (Carneiro de Barros et al, 2009;Karuppiah & Rajaram, 2012;Niamsa & Sittiwet, 2009;Ramos et al, 2012;Tepe, Daferera, Sökmen, Polissiou, & Sökmen, 2004). Karuppiah and Rajaram (2012)…”

Antimicrobial activity of essential oils of Origanum vulgare L. and Origanum majorana L. against Staphylococcus aureus isolated from poultry meat

“…Generally, the major compounds determine antimicrobial activity. Carvacrol, terpinen-4-ol and thymol are majority compounds in oregano EO (Barros et al, 2009), and terpinen-4-ol is the majority compound in marjoram EO (Busatta et al, 2008;Freire et al, 2011).…”

“…In general, an EO possessing the strongest antibacterial properties contains a high percentage of carvacrol and/or thymol, such as oregano or thyme (Burt, 2004). Barros et al (2009) reported that S. aureus, isolated from foods when exposed to oregano EO, reduced the colony-forming ability and salt tolerance. Souza et al (2000) concluded that oregano EO can be applied in foods so as to inhibit the growth of S. aureus by suppressing the synthesis of staphylococcal enterotoxin.…”

Influence of Essential Oils on Infectious Agents

“…They inhibit the synthesis of DNA and RNA nucleic acids and the production of proteins, which, among others, regulate gene expression in cells [1,9]. They limit or inhibit the activity of enzymes like lipase, coagulase [18], amino-acid decarboxylase [19], and enzymes that break down antibiotics. They reduce the virulence of germs by influencing factors connected with the cell wall or excretion.…”

“…They reduce the virulence of germs by influencing factors connected with the cell wall or excretion. They also inhibit their synthesis [18,20]. By deactivating the membrane efflux pumps, which remove antibiotics and bacteria communication factors outside the cell, they influence the biofilm, enabling its eradication, and they increase the penetration of antibiotics in the biomass.…”