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首页> 外文期刊>Journal of Medical Sciences >Antibacterial Activity of Essential Oils and their Effects on Nile Tilapia Fingerlings Performance
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Antibacterial Activity of Essential Oils and their Effects on Nile Tilapia Fingerlings Performance

机译：精油的抗菌活性及其对尼罗罗非鱼鱼种性能的影响

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This study investigated the antibacterial activity of five essential oils in-vitro. Also, the strongest antibacterial oil (thyme oil) was tested on performance of Nile tilapia ( Oreochromis niloticus ) fingerlings fish. Two experiments were carried out, in the first one antimicrobial activity of essential oils (EOs) of 5 medicinal plant s, ginger, black cumin, thyme, clove and watercress were evaluated ( in-vitro ). The screening of antibacterial activity was against Staphylococcus aureus , Pseudomonas aeruginosa , Escherichia coli , Listeria monocytogenes, Lactococcus lactis and Bacillus cereus . In the second experiment ( in-vivo ) 120 fish were divided in 4 groups. There were 3 replicate glass aquaria (per group) of 10 fish per aquarium. The 1st group fed basal diet (control) and the other groups (2-4) were fed basal diet supplemented with 0.1, 0.25 and 0.5% thyme oil. First experiment showed that thyme oil had the strongest antibacterial activity against all tested bacteria except Staph. aureus and E. coli . The more sensitive bacteria to thyme oil was Pseud. aeruginosa while . E. coli was least susceptible to it. Second experiment, showed that thyme oil significantly increase growth rate, feed intake and feed utilization of fish. The best level was 0.25%. Total protein and globulin concentrations in plasma were significantly increased by 0.1 and 0.25% thyme oil. The best economical efficiency was obtained by 0.25% thyme oil.
机译：这项研究调查了五种精油的体外抗菌活性。此外，还测试了最强的抗菌油（百里香油）对尼罗罗非鱼（Oreochromis niloticus）鱼种性能的影响。进行了两个实验，在第一个实验中，对5种药用植物的精油（EOs）的抗菌活性进行了评估（生姜，黑孜然，百里香，丁香和豆瓣菜）。对金黄色葡萄球菌，铜绿假单胞菌，大肠杆菌，单核细胞增生李斯特菌，乳酸乳球菌和蜡样芽胞杆菌的抗菌活性进行了筛选。在第二个实验（体内）中，将120条鱼分为4组。每个水族馆有3个玻璃水族箱（每组），每条10条鱼。第一组饲喂基础饮食（对照组），其他组（2-4人）饲喂补充了0.1％，0.25％和0.5％百里香油的基础饮食。第一个实验表明，百里香油对除葡萄球菌以外的所有受试细菌具有最强的抗菌活性。金黄色葡萄球菌和大肠杆菌。对百里香油更敏感的细菌是Pseud。铜绿。大肠杆菌对它的敏感性最低。第二个实验表明，百里香油显着提高了鱼类的生长速度，饲料采食量和饲料利用率。最好的水平是0.25％。血浆中总蛋白质和球蛋白浓度显着增加了0.1和0.25％百里香油。 0.25％百里香精油可获得最佳经济效益。

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