Antibacterial Effects of Ultrasound, Cinnamon Essential Oil, and Their Combination Against Listeria monocytogenes and Salmonella Typhimurium in Milk.

The antibacterial effects of ultrasound (US) and cinnamon essential oil (CEO), individually and combined, were investigated against Listeria monocytogenes and Salmonella Typhimurium in low- and high-fat milk during 6-day storage. At the end of storage, CEO alone decreased 2 and 2.2 log cycles of Salmonella Typhimurium and 2.5 and 3 log cycles of L. monocytogenes populations in low- and high-fat milk, respectively. US alone reduced 1.6 log cycle of Salmonella Typhimurium and 0.7 log cycle of L. monocytogenes in both milk type. The combined treatment could reduce 2.7 log cycle of Salmonella Typhimurium in low-fat milk and 3.8 log cycle in high-fat milk. The combined treatment also achieved 4.3 and 4.5 log cycle reductions of L. monocytogenes in low- and high-fat milk, respectively. The results of this study showed that the combination of CEO and US could be used as an effective antibacterial treatment in milk. PRACTICAL APPLICATIONS: Due to adverse effects of thermal processing on the sensory and nutritional properties of food and the potentially harmful effects of chemical preservatives, nonthermal preservation methods and natural antimicrobials have been gained much attention. In this study, the antibacterial effects of ultrasound (US) and cinnamon essential oil (CEO), individually and combined, were investigated against Listeria monocytogenes and Salmonella Typhimurium in low- and high-fat milk. The results indicated that combination of US and CEO could significantly decrease L. monocytogenes and Salmonella Typhimurium populations in milk. Then, this combined treatment may be used as an effective alternative method to microbial inactivation in milk.

Mortazavi N ，Aliakbarlu J 《-》

Comparison of Cinnamon Essential Oils from Leaf and Bark with Respect to Antimicrobial Activity and Sensory Acceptability in Strawberry Shake.

Cinnamon leaf and bark essential oils have long been used as natural preservatives and flavoring agents in foods. This study determined antimicrobial effects of leaf and bark of cinnamon essential oils (CEOs) against 2 foodborne pathogens, Salmonella Typhimurium (S.T.) and Listeria monocytogenes (L.m.), at 2 initial bacterial levels (4- and 9-log CFU/mL) in strawberry shakes. The antimicrobial study of CEOs at 0.1% and 0.5% in strawberry shakes against S.T. and L.M. showed a significant difference (P < 0.05) in log reductions of both bacterial growth at low (4-log CFU/mL) and high (9-log CFU/mL) initial bacterial levels. Addition of 0.5% CEOs into strawberry shakes at 4 °C completely inhibited both bacteria after a period of 8 d storage. Shelf-life study showed that acidity and total solid content were not affected during storage. The strawberry shakes containing bark CEO had higher ratings of sensory acceptability compared to leaf CEO, with or without the addition of 1% masking agent. In conclusion, this study demonstrated that CEO derived from bark was better than that from leaf in terms of their antimicrobial activity and sensory aspect. This study demonstrates that essential oils derived from cinnamon bark and leaf have the potential to be used as natural antimicrobial ingredient in milk beverages with respect to sensory aspect. This finding promotes the acceptance of natural antimicrobials among consumers, while providing enhanced safer products to the food industry application.

Brnawi WI ，Hettiarachchy NS ，Horax R ，Kumar-Phillips G ，Seo HS ，Marcy J ... -  《-》

Antimicrobial effects of alginate-based films containing essential oils on Listeria monocytogenes and Salmonella typhimurium present in bologna and ham.

Oussalah M ，Caillet S ，Salmiéri S ，Saucier L ，Lacroix M ... -  《JOURNAL OF FOOD PROTECTION》

Single and combined application of bacteriophage and cinnamon oils against pathogenic Listeria monocytogenes in milk and smoked salmon.

Maung AT ，Abdelaziz MNS ，Noor Mohammadi T ，Lwin SZC ，El-Telbany M ，Zhao J ，Wang C ，Lin Y ，Shen C ，Zayda M ，Masuda Y ，Honjoh KI ，Miyamoto T ... -  《-》

Antimicrobial activity of epsilon-polylysine against Escherichia coli O157:H7, Salmonella Typhimurium, and Listeria monocytogenes in various food extracts.

Geornaras I ，Yoon Y ，Belk KE ，Smith GC ，Sofos JN ... -  《-》