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恩诺沙星对蛭弧菌生长及吸附的影响
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上海市重点学科建设资助项目(No. Y1101); 上海市优秀青年教师科研专项基金(No. B-8101-08-0017); 上海海洋大学青年科研基金(No. A-0212-07-0251)


Effects of Enrofloxacin on the Growth and Attachment of Bdellovibrio Bacteria
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    摘要:

    本实验通过观察不同浓度恩诺沙星对固体培养条件下蛭弧菌产生噬斑和液体培养条件下蛭弧菌增殖的情况, 以及蛭弧菌在不同浓度恩诺沙星下吸附到载体上的情况, 研究了恩诺沙星对蛭弧菌BDF-H16生长及吸附的影响。实验发现:2 μg/mL、5 μg/mL、10 μg/mL、20 μg/mL和50 μg/mL恩诺沙星对蛭弧菌BDF-H16噬斑的产生及增殖均具有抑制作用(P<0.05)。在固体培养72 h后, 随着恩诺沙星浓度逐渐增大, 蛭弧菌BDF-H16产生的噬斑数目逐渐减少; 在液体培养72 h后, 随着恩诺沙星的浓度逐渐增高, 蛭弧菌BDF-H16的增殖浓度不断减少, 但10 μg/mL恩诺沙星并没有改变蛭弧菌BDF-H16的生长趋势。此外, 以沸石作为吸附载体, 2 μg/mL、5 μg/mL、10 μg/mL、20 μg/mL和50 μg/mL恩诺沙星降低了蛭弧菌BDF-H16吸附量, 随着恩诺沙星浓度的增大, 蛭弧菌BDF-H16的吸附量逐渐降低, 而蛭弧菌BDF-H16的吸附率却在一定恩诺沙星浓度(2 μg/mL~20 μg/mL)下却有所升高(P<0.05)。以上结果表明, 恩诺沙星对蛭弧菌BDF-H16噬斑的产生及增殖具有抑制作用, 但在有载体存在的情况下, 蛭弧菌的吸附能力在一定恩诺沙星浓度范围内有所增强, 添加载体沸石有助于降低恩诺沙星对蛭弧菌BDF-H16的不良影响。

    Abstract:

    In the experiment, the production of plagues by Bdellovibrio bacteria in solid medium cultivation, the reproduction of Bdellovibrio bacteria in liquid medium cultivation and the attachment of Bdellovibrio bacteria to carrier were observed, which aimed to study the effects of enrofloxacin on the growth and attachment ability of Bdellovibrio bacteria BDF-H16. Results indicated that in solid medium cultivation, the production of plagues by Bdellovibrio bacteria BDF-H16 was inhibited by different concentrations (2 μg/mL, 5 μg/mL, 10 μg/mL, 20 μg/mL, 50 μg/mL) of enrofloxacin and the inhibitory effects of enrofloxacin became stronger with the increase of the concentration of enrofloxacin. Similarly, in liquid medium cultivation, the reproduction of Bdellovibrio bacteria BDF-H16 was also obviously inhibited by different concentrations of enrofloxacin and higher concentrations of enrofloxacin such as 10 μg/mL, 20 μg/mL, 50 μg/mL had stronger inhibitory effects on the reproduction of BDF-H16. However, the growth tendency of Bdellovibrio bacteria BDF-H16 was not inhibited in 10 μg/mL enrofloxacin. Additionally, when zeolite was added, enrofloxacin had also inhibitory effects on the numbers of Bdellovibrio bacteria BDF-H16 attached to zeolite. With the increase of the concentrations of enrofloxacin, the numbers of Bdellovibrio bacteria BDF-H16 attached to zeolite became smaller and smaller. However, the attachment rate of Bdellovibrio bacteria BDF-H16 to zeolite became higher under 2 μg/mL-20 μg/mL enrofloxacin. The results above showed that enrofloxacin had inhibitory effects on the plague production and reproduction of Bdellovibrio bacteria BDF-H16, but the attachment ability of Bdellovibrio bacteria BDF-H16 was strengthened in liquid medium cultivation with 2 μg/mL-20 μg/mL enrofloxacin and zeolite, and adding zeolite helped to reduce the adverse effects of enrofloxacin on Bdellovibrio bacteria BDF-H16.

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邓 璐,曹海鹏,何 珊,杨先乐. 恩诺沙星对蛭弧菌生长及吸附的影响[J]. 微生物学通报, 2008, 35(8): 1192-1197

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