Sewage sludge as a source of triclosan-resistant bacteria

IF 0.9 Q4 CHEMISTRY, MULTIDISCIPLINARY Acta Chimica Slovaca Pub Date : 2019-04-01 DOI:10.2478/acs-2019-0006

Kristína Lépesová, Monika Krahulcová, T. Mackuľak, L. Bírošová

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引用次数: 4

Abstract

Abstract Subinhibitory concentrations of antibiotics and biocides in wastewaters and sewage sludge have a great impact on the development of antibiotic resistance and its spread among bacteria. The aim of this work was to determine the occurrence of coliform bacteria and enterococci resistant to biocide triclosan in samples of sewage sludge. Subsequently, isolated strains of coliform bacteria were identified and characterized in terms of their antibiotic susceptibility and ability to form a biofilm. Occurrence of the studied bacteria was monitored in three samples of stabilized sludge from three different wastewater treatment plants (Vrakuňa, Petržalka, and Senec). The number of triclosan-resistant coliforms was the highest in the sludge sample from the wastewater treatment plant in Senec and the lowest in the sludge sample from the wastewater treatment plant in Petržalka. Triclosan-resistant Enterococcus spp. were not found in any sample of stabilized sludge. Most isolates were identified as Citrobacter freundii and Serratia spp. Triclosan-resistant isolates showed also resistance to antibiotics and the majority of them were strong biofilm producers.

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污水污泥是耐三氯生细菌的来源

摘要废水和污泥中抗生素和杀菌剂的亚抑制浓度对抗生素耐药性的发展及其在细菌中的传播有很大影响。本研究的目的是测定污水污泥样品中大肠菌群和对杀菌剂三氯生耐药肠球菌的发生情况。随后，对分离的大肠菌群菌株进行了鉴定，并根据其抗生素敏感性和形成生物膜的能力进行了表征。在三个不同污水处理厂(Vrakuňa, Petržalka和Senec)的三个稳定污泥样本中监测所研究细菌的发生情况。耐三氯生大肠菌群数量以Senec污水处理厂的污泥样品最多，Petržalka污水处理厂的污泥样品最少。稳定污泥样品中未发现三氯生耐药肠球菌。大多数分离株鉴定为弗氏柠檬酸杆菌和沙雷氏菌，耐三氯生的分离株对抗生素也有耐药性，大多数是强生物膜产生菌。

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Acta Chimica Slovaca CHEMISTRY, MULTIDISCIPLINARY-

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