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首页> 外文期刊>Minerva biotecnologica >Serotyping of Escherichia coli from healthy cattle and analyses of antimicrobial activities of Chinese herbal drugs on Escherichia coli strains with different serotypes in Hulunbeier, China
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Serotyping of Escherichia coli from healthy cattle and analyses of antimicrobial activities of Chinese herbal drugs on Escherichia coli strains with different serotypes in Hulunbeier, China

机译：健康牛的大肠杆菌血清分型及中草药对呼伦贝尔市不同血清型大肠杆菌的抗菌活性分析

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Aim.The aim of this paper was to provide a scientific evidence for means of spread and infection patterns of Escherichia coli (E. coli), serotype distribution and drug resistance ability of E. coli strains from apparen-tly healthy dairy cows were examined. Methods. Based on the results of isolation and se-rotyping tests, among 212 animals investigated, 101 (47.64 %) were proved to carry E. coli strains. Except 15 isolates not been serotyped, 86 of total 101 isolates from different cattle distributed among 40 kinds of serotypes, some of which were known to be patho-genic for humans and animals, i.e., 02, 08, 078 and 0149. Results and conclusion. According to the findings of antimicrobial study, all of the five Chinese her-bal drugs (Rhizoma coptidis, Fructrs trichosanthis, Atractylodes chinensis, Scutellaria baicalensis georgi and Taraxaci mongolicum) used were active against E. coli with different serotypes at different extent. Atractylodes chinensis had the best antimicrobial acti-vity, of which the minimum inhibitory concentrations (MIC) ranged from 0.031 g-mL~(-1) to 0.125 g-mL~(-1), the minimal value of the minimum bactericidal concentration (MBC) was 0.062 g-mL~(-1). Rhizoma coptidis was the most inactive one against E. coli exhibiting MIC from 0.250 g-mL~(-1) to 0.500 g-mL~(-1)and no MBC values in concentrations range. The antimicrobial effects of Fructrs trichosanthis, Scutellaria baicalensis georgi and Taraxaci mongolicum were between the former two. Moreover, a change in antimicrobial activity of each drug was also found when it was tested against E. coli with different kinds of serotypes.
机译：目的。本论文旨在为检查外观健康的奶牛大肠杆菌菌株的传播和感染方式，血清型分布和耐药性提供科学依据。方法。根据分离和分离试验的结果，在研究的212只动物中，有101只（47.64％）被证明带有大肠杆菌。除未进行血清分型的15种分离株外，来自不同牛群的101种分离株中有86种分布在40种血清型中，其中有些已知对人类和动物具有致病性，即02、08、078和0149。结果和结论。根据抗菌素研究的结果，所使用的五种中草药（黄连，黄连子，白术，黄S和蒙古蒲公英）对不同血清型的大肠杆菌均有不同程度的活性。白术具有最佳的抗菌活性，其最小抑菌浓度（MIC）范围为0.031 g-mL〜（-1）至0.125 g-mL〜（-1），最小杀菌浓度为最小值（ MBC）为0.062 g-mL〜（-1）。黄连是对大肠杆菌最无活性的菌株，其MIC从0.250 g-mL〜（-1）到0.500 g-mL〜（-1），在浓度范围内没有MBC值。天花粉，黄S和蒙古蒲公英的抗菌作用在前两者之间。此外，当针对具有不同血清型的大肠杆菌进行测试时，每种药物的抗菌活性也都发生了变化。

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