Antibiotic resistance of enterococci and related bacteria in an urban wastewater treatment plant
Antibiotic resistance of enterococci and related bacteria in an urban wastewater treatment plant
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DOI：
10.1111/j.1574-6941.2005.00032.x
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发表时间：
2006-02-01
影响因子：
4.2
通讯作者：
Manaia, CM
中科院分区：
文献类型：
--
作者：
da Silva, MF;Tiago, I;Manaia, CM
这项工作的主要目的是研究生态的肠球菌和相关细菌的原材料和处理后的污水处理厂接收国内和预处理的工业废水，以评估治疗的影响，这组细菌之间的抗生素耐药表型的患病率。在原废水中发现的优势种是肠球菌histococcus，屎肠球菌和粪肠球菌。污水处理导致E.α < 0.1）和E. faecium（α < 0.1）;粪便在未处理的和处理的废水中保持相同。在检测的分离株中，肠球菌中未观察到万古霉素耐药性。屎肠球菌（Entercoccus faecium）和E.粪肠球菌对抗生素环丙沙星、红霉素和四环素的耐药率分别为33%、40%和57%。废水处理不能消除肠球菌的抗生素耐药菌株。与原废水相比，经处理的废水中的耐药性流行率显著增加（α < 0.02）表明了对环丙沙星耐药肠球菌的阳性选择。
The main objective of this work was to study the ecology of enterococci and related bacteria in raw and treated wastewater from a treatment plant receiving domestic and pretreated industrial effluents in order to assess the influence of treatment on the prevalence of antibiotic resistance phenotypes among this group of bacteria. The predominant species found in the raw wastewater were Entercoccus hirae, Entercoccus faecium and Entercoccus faecalis. Wastewater treatment led to a reduction in E. hirae (alpha < 0.1) and an increase in E. faecium (alpha < 0.1); the relative proportions of E. faecalis remained the same in the raw and in the treated wastewater. Among the isolates tested, no vancomycin resistance was observed among the enterococci. Entercoccus faecium and E. faecalis showed resistance prevalence values reaching 33%, 40% and 57% for the antibiotics ciprofloxacin, erythromycin and tetracycline, respectively. Antibiotic-resistant strains of enterococci were not eliminated by wastewater treatment. A positive selection of ciprofloxacin-resistant enterococci was indicated by a significant increase in resistance prevalence (alpha < 0.02) in treated wastewater compared with the raw wastewater.