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گواهی نمایه سازی مقاله Effects of monolaurin and lactic acid bacteria starter culture on growth of vegetative cells of Bacillus cereus in Iranian white fresh cheese

عنوان مقاله: Effects of monolaurin and lactic acid bacteria starter culture on growth of vegetative cells of Bacillus cereus in Iranian white fresh cheese
شناسه (COI) مقاله: JR_IJVST-4-1_002
منتشر شده در دوفصلنامه علوم و فنون دامپزشکی ایران در سال ۱۳۹۱
مشخصات نویسندگان مقاله:

Moslem Neyriz-Nagadehi - Department of Food Hygiene, Faculty of Veterinary Medicine, Islamic Azad University, Urmia branch, Urmia, Iran
Seyed Mehdi Razavi-Rohani - Department of Food Hygiene, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
Gity Karim - Department of Food Hygiene, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran
Amir Zeynali - Graduated Veterinary Medicine, Faculty of Veterinary Medicine, Islamic Azad University, Urmia branch, Urmia, Iran

خلاصه مقاله:
The harmful effects of many chemical food preservatives are well established, so this has triggered interest in natural methods of preservation. Monolaurin, a monoester of lauric acid,founds naturally in some foods and has various antiviral and antibacterial activities.Evaluation of the effects of monolaurin separately and in combination with lactic acid bacteria (LAB) starter culture on growth of vegetative cells of Bacillus cereus ATCC11778 in manufactured cheeses was the purpose of this research. In this study, the number of B. cereus in four groups of cheese (C1: without starter culture and monolaurin, T1: without starter culture; with monolaurin, C2: with starter culture; without monolaurin, T2: with starter culture and monolaurin) was counted on days 0, 1, 3, 5, and 7 of manufacture. In T1 group,monolaurinin concentrations of 800, 1200, 1600 and 2000 ppm decreased the number of B. cereus by 1.2, 2.1, 3 and 3.4 logs, respectively in comparison with C1 group. InT2 group with the same concentrations of monolaurin, the number of B. cereus in comparison with C2 group was not significantly affected (p> 0.05). In C2 group, starter culture decreased the number of B. cereus by 2.9 logs in comparison with C1 group. In contrary, the combination of starter culture with monolaurin in T2 group increased the number of B. cereus by 0.6 logs in comparison with C2 group. Furthermore, in C2 and T2 groups by increasing the storage time, the number of B. cereus decreased. According to these results, it can be concluded that in cheese samples of T1 group, monolaurin separately showed the inhibitory effects on the growth of B. cereus cells while in cheese samples of T2 group, the combination of monolaurin with starter culture did not demonstrate the synergistic inhibitory effects on the growth of this bacterium. Therefore, simultaneous use of monolaurin with starter culture is not recommended for improving the microbial shelf-life of Iranian white fresh cheese

کلمات کلیدی:
Monolaurin, starter culture, Bacillus cereus, Iranian white fresh cheese

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